Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 9, Problem 91H
“Dalmatian Darnation,” by Kathy Sparling
A greedy dog breeder named Spreckles
Bred puppies with numerous freckles
The Dalmatians he sought
Possessed spot upon spot
The more spots, he thought, the more shekels.
His competitors did not agree
That freckles would increase the fee.
The’ said, “Spots are quite nice
But they don’t affect price;
One should breed for improved pedigree.”
The breeders decided to prove
This strategy was a wrong move.
Breeding only for spots
Would wreak havoc, they thought.
His theoty they want to disprove.
They proposed a contest to Spreckles
Comparing dog prices to freckles.
In records they looked up
One hundred one pups:
Dalmatians that fetched the most shekels.
They asked Mr. Spreckles to name
An average spot count he’d claim
To bring in big bucks.
Said Spreckles, “Well, shucks,
It’s for one hundred one that I aim.”
Said an amateur statistician
Who wanted to help with this mission.
“Twenty-one for the sample
Standard deviation’s ample:
The’ examined one hundred and one
Dalmatians that fetched a good sum.
They counted each spot,
Mark, freckle and dot
And tallied up every one.
Instead of one hundred one spots
They averaged ninety six dots
Can they muzzle Spreckles’
Obsession with freckles
Based on all the dog data they’ve got?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A smallish urn contains 25 small plastic bunnies – 7 of which are pink and 18 of which are white. 10 bunnies are drawn from the urn at random with replacement, and X is the number of pink bunnies that are drawn.
(a) P(X = 5) ≈
(b) P(X<6) ≈
The Whoville small urn contains 100 marbles – 60 blue and 40 orange. The Grinch sneaks in one night and grabs a simple random sample (without replacement) of 15 marbles.
(a) The probability that the Grinch gets exactly 6 blue marbles is [ Select ] ["≈ 0.054", "≈ 0.043", "≈ 0.061"] .
(b) The probability that the Grinch gets at least 7 blue marbles is [ Select ] ["≈ 0.922", "≈ 0.905", "≈ 0.893"] .
(c) The probability that the Grinch gets between 8 and 12 blue marbles (inclusive) is [ Select ] ["≈ 0.801", "≈ 0.760", "≈ 0.786"] . The Whoville small urn contains 100 marbles – 60 blue and 40 orange. The Grinch sneaks in one night and grabs a simple random sample (without replacement) of 15 marbles.
(a)…
Suppose an experiment was conducted to compare the mileage(km) per litre
obtained by competing brands of petrol I,II,III. Three new Mazda, three new
Toyota and three new Nissan cars were available for experimentation. During the
experiment the cars would operate under same conditions in order to eliminate
the effect of external variables on the distance travelled per litre on the assigned
brand of petrol. The data is given as below:
Brands of Petrol Mazda Toyota Nissan
I 10.6 12.0 11.0
II 9.0 15.0 12.0
III 12.0 17.4 13.0
(a) Test at the 5% level of significance whether there are signi
cant differences among the brands of fuels and also among the cars. [10]
(b) Compute the standard error for comparing any two fuel brands means. Hence
compare, at the 5% level of significance, each of fuel brands II, and III with
the standard fuel brand I. [10]
Business discuss
Chapter 9 Solutions
Introductory Statistics
Ch. 9 - A medical trial is conducted to test whether or...Ch. 9 - We want to test whether the mean height of eighth...Ch. 9 - We want to test If It takes fewer than 45 minutes...Ch. 9 - On a state drivers test. about .10% pass the test...Ch. 9 - Suppose the null hypothesis, H0, Is: the blood...Ch. 9 - Suppose the null hypothesis. H0. Is: a patient is...Ch. 9 - “Red tide” is a bloom of poison-producing algae—a...Ch. 9 - Determine both Type I and Type II errors for the...Ch. 9 - A normal distribution has a standard deviation of...Ch. 9 - Its a Boy Genetics Labs claim their procedures...
Ch. 9 - H0:=10, H0:< 10 Assume the p-value is 0.0935. What...Ch. 9 - H0:1,Ha:1 Assume the p-value is 0.1243. What type...Ch. 9 - H0:p=0.5,Ha:p0.5 Assume the p-value is 0.2564....Ch. 9 - The mean throwing distance of a football for...Ch. 9 - It is believed that a stock price for a particular...Ch. 9 - A teacher believes that 85% of students in the...Ch. 9 - Marketers believe that 92% of adults In the United...Ch. 9 - You are testing that the mean speed of your cable...Ch. 9 - You ate testing that the mean speed of your cable...Ch. 9 - The American family has an average of two...Ch. 9 - The mean entry level salary of an employee at a...Ch. 9 - A sociologist claims the probability that a person...Ch. 9 - A sociologist claims the probability that a person...Ch. 9 - In a population of fish approximately 42% are...Ch. 9 - Suppose that a recent article stated that the mean...Ch. 9 - A random survey of 75 death row Inmates revealed...Ch. 9 - The National Institute of Mental Health published...Ch. 9 - The mean price of mid-sized cars In a region is...Ch. 9 - A sleeping bag Is rested to withstand temperatures...Ch. 9 - For Exercise 9.12, what are and in words?Ch. 9 - In words, describe 1— 3For Exercise 9.12.Ch. 9 - A group of doctors is deciding whether or not to...Ch. 9 - A group of doctors is deciding whether or not to...Ch. 9 - The power of a test is 0.981. What is the...Ch. 9 - A group of divers is exploring an old sunken ship....Ch. 9 - A microbiologist is testing a water sample for...Ch. 9 - A microbiologist is testing a water sample for...Ch. 9 - Which two distributions can you use for hypothesis...Ch. 9 - Which distribution do you use when you are testing...Ch. 9 - Which distribution do you use when the standard...Ch. 9 - A population mean Is 13. The sample mean is 12.8....Ch. 9 - A population has a mean is 25 and a standard...Ch. 9 - It Is thought that .12% of respondents in a taste...Ch. 9 - You ate performing a hypothesis test of a single...Ch. 9 - You are performing a hypothesis test of a single...Ch. 9 - You are performing a hypothesis test of a single...Ch. 9 - You are performing a hypothesis test of a single...Ch. 9 - You are peform1ng a hypothesis test of a single...Ch. 9 - When do you reject the null hypothesis?Ch. 9 - The probability of winning the grand prize at a...Ch. 9 - The probability of winning the grand prize at a...Ch. 9 - It is believed that the mean height of high school...Ch. 9 - The mean age of graduate students at a University...Ch. 9 - Does the shaded region represent a low or a high...Ch. 9 - What should you do when a >p-value?Ch. 9 - What should you do if a = p-value?Ch. 9 - If you do not reject the null hypothesis, then it...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - Use the blowing information to answer the next...Ch. 9 - A random survey of 75 death row inmates revealed...Ch. 9 - Assume H0: = 9 and H0:< 9. Is this a left-tailed,...Ch. 9 - Assume H0:6 and H0: > 6. Is this a left-tailed,...Ch. 9 - Assume H0: p = 0.25 and Ha: p 0.25. Is this a...Ch. 9 - Draw the general graph of a left-tailed test.Ch. 9 - Draw the graph of a two-tailed test.Ch. 9 - A bottle of water Is labeled as containing 16...Ch. 9 - Your friend claims that his mean golf score Is 63....Ch. 9 - A bathroom scale claims to be able to dentify...Ch. 9 - You flip a coin and record whether it shows heads...Ch. 9 - If the alternative hypothesis has a not equals ( )...Ch. 9 - Assume the null hypothesis states that the mean is...Ch. 9 - Assume the null hypothesis states that the mean is...Ch. 9 - Assume the null hypothesis states that the mean Is...Ch. 9 - Some of the following statements refer to the null...Ch. 9 - Over the past few decades, public health officials...Ch. 9 - A statistics instructor believes that fewer than...Ch. 9 - Previously, an organization reported that...Ch. 9 - State the Type I and Type II errors in complete...Ch. 9 - For statements a-j in Exercise 9.109. answer the...Ch. 9 - When a new drug is created. the pharmaceutical...Ch. 9 - A statistics instructor believes that fewer than...Ch. 9 - It Is believed that Lake Tahoe Community College...Ch. 9 - Previously, an organization reported that...Ch. 9 - It Is believed that Lake Tahoe Community College...Ch. 9 - The National Institute of Mental Health published...Ch. 9 - A particular brand of tires claims that its deluxe...Ch. 9 - From generation to generation, the mean age when...Ch. 9 - The cost of a daily newspaper varies from city to...Ch. 9 - An article in the San Jose Mercury News stated...Ch. 9 - The mean number of sick days an employee takes per...Ch. 9 - In 1955, Life Magazine reported that the 25...Ch. 9 - Your sta1stIcs Instructor claims that 60 percent...Ch. 9 - A Nissan Motor Corporation advertisement read, The...Ch. 9 - Refer to Exercise 9.19. Conduct a hypothesis test...Ch. 9 - According to an article in Newsweek, the natural...Ch. 9 - A poll done for Newsweek found that 13% of...Ch. 9 - The mean work week for engineers In a start-up...Ch. 9 - Use the Lap time data for Lap .1 (see Appendix C)...Ch. 9 - Use the initial Public Offering’ data (see...Ch. 9 - “Asian Family Reunion,” by Chau Nguyen Every two...Ch. 9 - ‘The Problem with Angels,” by Cyndy Dowling...Ch. 9 - “Blowing Bubbles,” by Sondra Prull Studying stats...Ch. 9 - “Dalmatian Darnation,” by Kathy Sparling A greedy...Ch. 9 - ‘MacaronI and Cheese, please! I” by Nedda...Ch. 9 - “William Shakespeare: The Tragedy of Hamlet....Ch. 9 - “Untitled.” by Stephen Chen lye often wondered how...Ch. 9 - Japanese Glrls Names’ by Kumi Furnichi It used to...Ch. 9 - ‘Phillip’s Wish,” by Suzanne Osorlo My nephew...Ch. 9 - “The Craven,” by Mark Salangsang Once upon a...Ch. 9 - Toastmasters Inteniational cites a repol by Gallop...Ch. 9 - Sixty-eight percent of online courses taught at...Ch. 9 - According to an article In Bloomberg Businessweek,...Ch. 9 - The mean age of De Anza College students in a...Ch. 9 - Registered nurses earned an average annual salary...Ch. 9 - La Leche League International reports that the...Ch. 9 - Over the past few decades, public health officials...Ch. 9 - A statistics instnictor believes that fewer than...Ch. 9 - Previously, an organization reported that...Ch. 9 - According to the Centet for Disease Control...Ch. 9 - A recent survey In the N.Y. limes Almanac...Ch. 9 - Driver error can be listed as the cause of...Ch. 9 - The US Department of Energy reported that 51.7% of...Ch. 9 - For Americans using library services, the American...Ch. 9 - The Weather Underground reported that the mean...Ch. 9 - A survey in the N.Y. limes Almanac finds the mean...Ch. 9 - A report by the Gallup Poll found that a woman...Ch. 9 - According to the N.Y Times Almanac the mean family...Ch. 9 - The student academic group on a college campus...
Additional Math Textbook Solutions
Find more solutions based on key concepts
A categorical variable has three categories, with the following frequencies of occurrence: a. Compute the perce...
Basic Business Statistics, Student Value Edition
Limits of sequences Write the terms a1, a2, a3, and a4 of the following sequences. If the sequence appears to c...
Calculus: Early Transcendentals (2nd Edition)
A child has 12 blocks, of which 6 are black, 4 are red, 1 is white, and 1 is blue. If the child puts the blocks...
A First Course in Probability (10th Edition)
Combining rules Use the Chain Rule combined with other differentiation rules to find the derivative of the foll...
Calculus: Early Transcendentals (2nd 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)
In Exercises 19–22, r(t) is the position of a particle in space at time t. Find the angle between the velocity ...
University Calculus: Early Transcendentals (4th 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
- What would you say about a set of quantitative bivariate data whose linear correlation is -1? What would a scatter diagram of the data look like? (5 points)arrow_forwardBusiness discussarrow_forwardAnalyze the residuals of a linear regression model and select the best response. yes, the residual plot does not show a curve no, the residual plot shows a curve yes, the residual plot shows a curve no, the residual plot does not show a curve I answered, "No, the residual plot shows a curve." (and this was incorrect). I am not sure why I keep getting these wrong when the answer seems obvious. Please help me understand what the yes and no references in the answer.arrow_forward
- a. Find the value of A.b. Find pX(x) and py(y).c. Find pX|y(x|y) and py|X(y|x)d. Are x and y independent? Why or why not?arrow_forwardAnalyze the residuals of a linear regression model and select the best response.Criteria is simple evaluation of possible indications of an exponential model vs. linear model) no, the residual plot does not show a curve yes, the residual plot does not show a curve yes, the residual plot shows a curve no, the residual plot shows a curve I selected: yes, the residual plot shows a curve and it is INCORRECT. Can u help me understand why?arrow_forwardYou have been hired as an intern to run analyses on the data and report the results back to Sarah; the five questions that Sarah needs you to address are given below. please do it step by step on excel Does there appear to be a positive or negative relationship between price and screen size? Use a scatter plot to examine the relationship. Determine and interpret the correlation coefficient between the two variables. In your interpretation, discuss the direction of the relationship (positive, negative, or zero relationship). Also discuss the strength of the relationship. Estimate the relationship between screen size and price using a simple linear regression model and interpret the estimated coefficients. (In your interpretation, tell the dollar amount by which price will change for each unit of increase in screen size). Include the manufacturer dummy variable (Samsung=1, 0 otherwise) and estimate the relationship between screen size, price and manufacturer dummy as a multiple…arrow_forward
- Here is data with as the response variable. x y54.4 19.124.9 99.334.5 9.476.6 0.359.4 4.554.4 0.139.2 56.354 15.773.8 9-156.1 319.2Make a scatter plot of this data. Which point is an outlier? Enter as an ordered pair, e.g., (x,y). (x,y)= Find the regression equation for the data set without the outlier. Enter the equation of the form mx+b rounded to three decimal places. y_wo= Find the regression equation for the data set with the outlier. Enter the equation of the form mx+b rounded to three decimal places. y_w=arrow_forwardYou have been hired as an intern to run analyses on the data and report the results back to Sarah; the five questions that Sarah needs you to address are given below. please do it step by step Does there appear to be a positive or negative relationship between price and screen size? Use a scatter plot to examine the relationship. Determine and interpret the correlation coefficient between the two variables. In your interpretation, discuss the direction of the relationship (positive, negative, or zero relationship). Also discuss the strength of the relationship. Estimate the relationship between screen size and price using a simple linear regression model and interpret the estimated coefficients. (In your interpretation, tell the dollar amount by which price will change for each unit of increase in screen size). Include the manufacturer dummy variable (Samsung=1, 0 otherwise) and estimate the relationship between screen size, price and manufacturer dummy as a multiple linear…arrow_forwardExercises: Find all the whole number solutions of the congruence equation. 1. 3x 8 mod 11 2. 2x+3= 8 mod 12 3. 3x+12= 7 mod 10 4. 4x+6= 5 mod 8 5. 5x+3= 8 mod 12arrow_forward
- Scenario Sales of products by color follow a peculiar, but predictable, pattern that determines how many units will sell in any given year. This pattern is shown below Product Color 1995 1996 1997 Red 28 42 21 1998 23 1999 29 2000 2001 2002 Unit Sales 2003 2004 15 8 4 2 1 2005 2006 discontinued Green 26 39 20 22 28 14 7 4 2 White 43 65 33 36 45 23 12 Brown 58 87 44 48 60 Yellow 37 56 28 31 Black 28 42 21 Orange 19 29 Purple Total 28 42 21 49 68 78 95 123 176 181 164 127 24 179 Questions A) Which color will sell the most units in 2007? B) Which color will sell the most units combined in the 2007 to 2009 period? Please show all your analysis, leave formulas in cells, and specify any assumptions you make.arrow_forwardOne hundred students were surveyed about their preference between dogs and cats. The following two-way table displays data for the sample of students who responded to the survey. Preference Male Female TOTAL Prefers dogs \[36\] \[20\] \[56\] Prefers cats \[10\] \[26\] \[36\] No preference \[2\] \[6\] \[8\] TOTAL \[48\] \[52\] \[100\] problem 1 Find the probability that a randomly selected student prefers dogs.Enter your answer as a fraction or decimal. \[P\left(\text{prefers dogs}\right)=\] Incorrect Check Hide explanation Preference Male Female TOTAL Prefers dogs \[\blueD{36}\] \[\blueD{20}\] \[\blueE{56}\] Prefers cats \[10\] \[26\] \[36\] No preference \[2\] \[6\] \[8\] TOTAL \[48\] \[52\] \[100\] There were \[\blueE{56}\] students in the sample who preferred dogs out of \[100\] total students.arrow_forwardBusiness discussarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell
Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
Elementary Algebra
Algebra
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:OpenStax - Rice University
What Are Research Ethics?; Author: HighSchoolScience101;https://www.youtube.com/watch?v=nX4c3V23DZI;License: Standard YouTube License, CC-BY
What is Ethics in Research - ethics in research (research ethics); Author: Chee-Onn Leong;https://www.youtube.com/watch?v=W8Vk0sXtMGU;License: Standard YouTube License, CC-BY