Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 4.9TI
The state health board is concerned about the amount of fruit available in school lunches. Forty-eight percent of schools in the state offer fruit in their lunches every day. This implies that 52% do not. What would a “success” be in this case?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
4.96 The breaking strengths for 1-foot-square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2,250 pounds per square inch (psi) and a standard deviation of 10.2 psi. Find the probability of selecting a 1-foot-square sample of material at random that on testing would have a breaking strength in excess of 2,265 psi.4.97 Refer to Exercise 4.96. Suppose that a new synthetic fabric has been developed that may have a different mean breaking strength. A random sample of 15 1-foot sections is obtained, and each section is tested for breaking strength. If we assume that the population standard deviation for the new fabric is identical to that for the old fabric, describe the sampling distribution forybased on random samples of 15 1-foot sections of new fabric
Une Entreprise œuvrant dans le domaine du multividéo donne l'opportunité à ses
programmeurs-analystes d'évaluer la performance des cadres supérieurs.
Voici les résultats obtenues (sur une échelle de 10 à 50) où 50 représentent une
excellente performance. 10 programmeurs furent sélectionnés au hazard pour
évaluer deux cadres. Un rapport Excel est également fourni.
Programmeurs
Cadre A Cadre B
1
34
36
2
32
34
3
18
19
33
38
19
21
21
23
7
35
34
8
20
20
9
34
34
10
36
34
Test d'égalité des espérances: observations pairées
A television news channel samples 25 gas stations from its local area and uses the results to estimate the average gas price for the state. What’s wrong with its margin of error?
Chapter 4 Solutions
Introductory Statistics
Ch. 4 - A hospital researcher Is Interested In the number...Ch. 4 - Jeremiah has basketball practice two days a week....Ch. 4 - A hospital researcher is interested in the number...Ch. 4 - You are playing a game of chance In which four...Ch. 4 - Suppose you play a game with a spinner. You play...Ch. 4 - On Ma 11, 2013 at 9:30 PM. the probability that...Ch. 4 - The state health board is concerned about the...Ch. 4 - A trainer is teaching a dolphin to do tricks. The...Ch. 4 - A fair, six-sided die is rolled ten times. Each...Ch. 4 - Sixty-five percent of people pass the state...
Ch. 4 - About 32% of students participate in a community...Ch. 4 - According to a Gallup poll, 60% of American adults...Ch. 4 - During the 2013 regular NBA season. DeAndre Jordan...Ch. 4 - A lacrosse team is selecting a captain. The names...Ch. 4 - You throw darts at a board until you hit the...Ch. 4 - An instructor feels that 15% of students get below...Ch. 4 - You need to find a store that carries a special...Ch. 4 - The probability of a defective steel rod is 0.01....Ch. 4 - The literacy rate for a nation measures the...Ch. 4 - A bag contains letter tiles. Forty-four of the...Ch. 4 - A gross of eggs contains 144 eggs. A particular...Ch. 4 - A palette has 200 milk cartons. Of the 200 canons,...Ch. 4 - An intramural basketball team Is to be chosen...Ch. 4 - The average number of fish caught In an hour Is...Ch. 4 - An electronics store expects to have ten returns...Ch. 4 - An emergency room at a particular hospital gets an...Ch. 4 - A customer service center receives about ten...Ch. 4 - According to a recent poll by the Pew Internet...Ch. 4 - Atlanta’s Hartsfield-Jackson International Airport...Ch. 4 - On May 13, 2013, starting at 4:30 PM, the...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Use the following information o answer the next...Ch. 4 - Suppose that the PDF for the number of years it...Ch. 4 - A theater group holds a fund-raiser. It sells 100...Ch. 4 - A game Involves selecting a card from a regular...Ch. 4 - You buy a lottery ticket to a lottery that costs...Ch. 4 - Complete the PDF and answer the questions. a. Find...Ch. 4 - Suppose that you are offered the following deal.’...Ch. 4 - A venture capitalist, willing to invest...Ch. 4 - Suppose that 20,000 married adults in the United...Ch. 4 - Suppose that the PDF for the number of years It...Ch. 4 - People visiting video rental stores often rent...Ch. 4 - A friend’ offers you the following deal. For a $10...Ch. 4 - Florida State University has 14 statistics classes...Ch. 4 - In a lottery, there are 250 prizes of $5. 50...Ch. 4 - According to a recent ankle the average number of...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following information to answer the next...Ch. 4 - People visiting video rental stores often rent...Ch. 4 - A school newspaper reporter decides to randomly...Ch. 4 - Use the following information to answer the next...Ch. 4 - Use the following infonnanors to answer the next...Ch. 4 - What is the probability that the San Jose Sharks...Ch. 4 - A student takes a ten-question true-false quiz,...Ch. 4 - A student takes a 32-question multiple-choice...Ch. 4 - Six different colored dice are rolled. Of interest...Ch. 4 - More than 96 percent of the veiy Largest colleges...Ch. 4 - Suppose that about 85% of graduating students...Ch. 4 - At The Fencing Center. 60% of the fencers use the...Ch. 4 - Approximately 8% of students at a local high...Ch. 4 - The chance of an IRS audit for a tax return with...Ch. 4 - It has been estimated that only about 30% of...Ch. 4 - There are two similar games played for Chinese New...Ch. 4 - According to The World Bank, only 9% of the...Ch. 4 - The literacy rate for a nation measures the...Ch. 4 - A consumer looking to buy a used red Miata car...Ch. 4 - Suppose that the probability that an adult In...Ch. 4 - It has been estimated that only about 3000 of...Ch. 4 - In one of its Spring catalogs, Li. Beans...Ch. 4 - Suppose that you are performing the probability...Ch. 4 - Ellen has music practice three days a week. She...Ch. 4 - The World Bank records the prevalence of HIV In...Ch. 4 - According to a recent Pew Research poll, 75% of...Ch. 4 - A group of Martial Arts students Is planning on...Ch. 4 - In one of its Spring catalogs, L.L. Bean...Ch. 4 - Suppose that a technology task force Is being...Ch. 4 - Suppose that nine Massachusetts athletes are...Ch. 4 - A bridge hand Is defined as 13 cards selected at...Ch. 4 - The switchboard in a Minneapolis law office gets...Ch. 4 - The matemity ward at Dr. Jose Fabella Memorial...Ch. 4 - A manufacturer of Christmas tree light bulbs knows...Ch. 4 - The average number of children a Japanese woman...Ch. 4 - The average number of children a Spanish woman has...Ch. 4 - Fertile, female cats produce an average of three...Ch. 4 - The chance of having an extra fortune In a fortune...Ch. 4 - According to the South Carolina Department of...Ch. 4 - The chance of an IRS audit for a tax return with...Ch. 4 - Approximately 8% of students at a local high...Ch. 4 - On average, Pierre, an amateur chef, drops three...Ch. 4 - Use the following information to answer the next v...Ch. 4 - Use the following information to answer the next v...
Additional Math Textbook Solutions
Find more solutions based on key concepts
Derivatives of Logarithms
In Exercises 11-40, find the derivative of y with respect to x, t, or θ, as appropria...
University Calculus: Early Transcendentals (4th Edition)
The following set of data is from sample of n=5: a. Compute the mean, median, and mode. b. Compute the range, v...
Basic Business Statistics, Student Value Edition
3. Notation In general, what do the symbols and represent? What are the values of and for samples of size 6...
Elementary Statistics (13th Edition)
TRY IT YOURSELF 1
Find the mean of the points scored by the 51 winning teams listed on page 39.
Elementary Statistics: Picturing the World (7th Edition)
Trigonometric substitutions Evaluate the following integrals. 17. 64x2dx
Calculus: Early Transcendentals (2nd Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- You’re fed up with keeping Fido locked inside, so you conduct a mail survey to find out people’s opinions on the new dog barking ordinance in a certain city. Of the 10,000 people who receive surveys, 1,000 respond, and only 80 are in favor of it. You calculate the margin of error to be 1.2 percent. Explain why this reported margin of error is misleading.arrow_forwardYou find out that the dietary scale you use each day is off by a factor of 2 ounces (over — at least that’s what you say!). The margin of error for your scale was plus or minus 0.5 ounces before you found this out. What’s the margin of error now?arrow_forwardSuppose that Sue and Bill each make a confidence interval out of the same data set, but Sue wants a confidence level of 80 percent compared to Bill’s 90 percent. How do their margins of error compare?arrow_forward
- Suppose that you conduct a study twice, and the second time you use four times as many people as you did the first time. How does the change affect your margin of error? (Assume the other components remain constant.)arrow_forwardOut of a sample of 200 babysitters, 70 percent are girls, and 30 percent are guys. What’s the margin of error for the percentage of female babysitters? Assume 95 percent confidence.What’s the margin of error for the percentage of male babysitters? Assume 95 percent confidence.arrow_forwardYou sample 100 fish in Pond A at the fish hatchery and find that they average 5.5 inches with a standard deviation of 1 inch. Your sample of 100 fish from Pond B has the same mean, but the standard deviation is 2 inches. How do the margins of error compare? (Assume the confidence levels are the same.)arrow_forward
- A survey of 1,000 dental patients produces 450 people who floss their teeth adequately. What’s the margin of error for this result? Assume 90 percent confidence.arrow_forwardThe annual aggregate claim amount of an insurer follows a compound Poisson distribution with parameter 1,000. Individual claim amounts follow a Gamma distribution with shape parameter a = 750 and rate parameter λ = 0.25. 1. Generate 20,000 simulated aggregate claim values for the insurer, using a random number generator seed of 955.Display the first five simulated claim values in your answer script using the R function head(). 2. Plot the empirical density function of the simulated aggregate claim values from Question 1, setting the x-axis range from 2,600,000 to 3,300,000 and the y-axis range from 0 to 0.0000045. 3. Suggest a suitable distribution, including its parameters, that approximates the simulated aggregate claim values from Question 1. 4. Generate 20,000 values from your suggested distribution in Question 3 using a random number generator seed of 955. Use the R function head() to display the first five generated values in your answer script. 5. Plot the empirical density…arrow_forwardFind binomial probability if: x = 8, n = 10, p = 0.7 x= 3, n=5, p = 0.3 x = 4, n=7, p = 0.6 Quality Control: A factory produces light bulbs with a 2% defect rate. If a random sample of 20 bulbs is tested, what is the probability that exactly 2 bulbs are defective? (hint: p=2% or 0.02; x =2, n=20; use the same logic for the following problems) Marketing Campaign: A marketing company sends out 1,000 promotional emails. The probability of any email being opened is 0.15. What is the probability that exactly 150 emails will be opened? (hint: total emails or n=1000, x =150) Customer Satisfaction: A survey shows that 70% of customers are satisfied with a new product. Out of 10 randomly selected customers, what is the probability that at least 8 are satisfied? (hint: One of the keyword in this question is “at least 8”, it is not “exactly 8”, the correct formula for this should be = 1- (binom.dist(7, 10, 0.7, TRUE)). The part in the princess will give you the probability of seven and less than…arrow_forward
- please answer these questionsarrow_forwardSelon une économiste d’une société financière, les dépenses moyennes pour « meubles et appareils de maison » ont été moins importantes pour les ménages de la région de Montréal, que celles de la région de Québec. Un échantillon aléatoire de 14 ménages pour la région de Montréal et de 16 ménages pour la région Québec est tiré et donne les données suivantes, en ce qui a trait aux dépenses pour ce secteur d’activité économique. On suppose que les données de chaque population sont distribuées selon une loi normale. Nous sommes intéressé à connaitre si les variances des populations sont égales.a) Faites le test d’hypothèse sur deux variances approprié au seuil de signification de 1 %. Inclure les informations suivantes : i. Hypothèse / Identification des populationsii. Valeur(s) critique(s) de Fiii. Règle de décisioniv. Valeur du rapport Fv. Décision et conclusion b) A partir des résultats obtenus en a), est-ce que l’hypothèse d’égalité des variances pour cette…arrow_forwardAccording to an economist from a financial company, the average expenditures on "furniture and household appliances" have been lower for households in the Montreal area than those in the Quebec region. A random sample of 14 households from the Montreal region and 16 households from the Quebec region was taken, providing the following data regarding expenditures in this economic sector. It is assumed that the data from each population are distributed normally. We are interested in knowing if the variances of the populations are equal. a) Perform the appropriate hypothesis test on two variances at a significance level of 1%. Include the following information: i. Hypothesis / Identification of populations ii. Critical F-value(s) iii. Decision rule iv. F-ratio value v. Decision and conclusion b) Based on the results obtained in a), is the hypothesis of equal variances for this socio-economic characteristic measured in these two populations upheld? c) Based on the results obtained in a),…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:9781133382119
Author:Swokowski
Publisher:Cengage
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Statistics 4.1 Point Estimators; Author: Dr. Jack L. Jackson II;https://www.youtube.com/watch?v=2MrI0J8XCEE;License: Standard YouTube License, CC-BY
Statistics 101: Point Estimators; Author: Brandon Foltz;https://www.youtube.com/watch?v=4v41z3HwLaM;License: Standard YouTube License, CC-BY
Central limit theorem; Author: 365 Data Science;https://www.youtube.com/watch?v=b5xQmk9veZ4;License: Standard YouTube License, CC-BY
Point Estimate Definition & Example; Author: Prof. Essa;https://www.youtube.com/watch?v=OTVwtvQmSn0;License: Standard Youtube License
Point Estimation; Author: Vamsidhar Ambatipudi;https://www.youtube.com/watch?v=flqhlM2bZWc;License: Standard Youtube License