
Elementary Statistics (13th Edition)
13th Edition
ISBN: 9780134462455
Author: Mario F. Triola
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 2.1, Problem 27BSC
Large Data Sets. Exercises 25–28 involve large sets of data, so technology should be used. Complete lists of the data are not included in Appendix B, but they can be downloaded from the website TriolaStats.com. Use the indicated data and construct the frequency distribution.
27. Earthquake Magnitudes Use the magnitudes of the 600 earthquakes included in Data Set 21 “Earthquakes.” Use a class width of 0.5 and begin with a lower class limit of 1.00. Does the frequency distribution appear to be a
Expert Solution & Answer

Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Selon 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…
According 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),…
A major company in the Montreal area, offering a range of engineering services from project preparation to construction execution, and industrial project management, wants to ensure that the individuals who are responsible for project cost estimation and bid preparation demonstrate a certain uniformity in their estimates. The head of civil engineering and municipal services decided to structure an experimental plan to detect if there could be significant differences in project evaluation.
Seven projects were selected, each of which had to be evaluated by each of the two estimators, with the order of the projects submitted being random. The obtained estimates are presented in the table below.
a) Complete the table above by calculating: i. The differences (A-B) ii. The sum of the differences iii. The mean of the differences iv. The standard deviation of the differences
b) What is the value of the t-statistic?
c) What is the critical t-value for this test at a significance level of 1%?…
Chapter 2 Solutions
Elementary Statistics (13th Edition)
Ch. 2.1 - McDonalds Dinner Service Times Refer 10 the...Ch. 2.1 - McDonalds Dinner Service Times Refer to the...Ch. 2.1 - Relative Frequency Distribution Use percentages to...Ch. 2.1 - Whats Wrong? Heights of adult males are known to...Ch. 2.1 - In Exercise 58, identify the class width, class...Ch. 2.1 - In Exercises 58, identify the class width, class...Ch. 2.1 - In Exercises 58, identify the class width, class...Ch. 2.1 - In Exercises 58, identify the class width, class...Ch. 2.1 - Normal Distributions. In Exercises 9 and 10, using...Ch. 2.1 - Normal Distributions. In Exercises 9 and 10, using...
Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Burger King Dinner Service Times Refer to Data Set...Ch. 2.1 - Wendys Lunch Service Times Refer to Data Set 25...Ch. 2.1 - Wendys Dinner Service Times Refer to Data Set 25...Ch. 2.1 - Analysis of Last Digits Heights of statistics...Ch. 2.1 - Analysis of Last Digits Weights of respondents...Ch. 2.1 - Oscar Winners Construct one table (similar to...Ch. 2.1 - Blood Platelet Counts Construct one table (similar...Ch. 2.1 - Cumulative Frequency Distributions. In Exercises...Ch. 2.1 - Cumulative Frequency Distributions. In Exercises...Ch. 2.1 - Categorical Data. In Exercises 23 and 24, use the...Ch. 2.1 - Categorical Data. In Exercises 23 and 24, use the...Ch. 2.1 - Large Data Sets. Exercises 2528 involve large sets...Ch. 2.1 - Large Data Sets. Exercises 2528 involve large sets...Ch. 2.1 - Large Data Sets. Exercises 2528 involve large sets...Ch. 2.1 - Large Data Sets. Exercises 2528 involve large sets...Ch. 2.1 - Interpreting Effects of Outliers Refer to Data Set...Ch. 2.2 - Heights Heights of adult males are normally...Ch. 2.2 - More Heights The population of heights of adult...Ch. 2.2 - Blood Platelet Counts Listed below are blood...Ch. 2.2 - Blood Platelet Counts If we collect a sample of...Ch. 2.2 - Interpreting a Histogram. In Exercises 58, answer...Ch. 2.2 - Prob. 6BSCCh. 2.2 - Interpreting a Histogram. In Exercises 58, answer...Ch. 2.2 - Prob. 8BSCCh. 2.2 - Constructing Histograms. In Exercises 9-16,...Ch. 2.2 - Constructing Histograms. In Exercises 9-16,...Ch. 2.2 - Burger King Lunch Service Times Use the frequency...Ch. 2.2 - Burger King Dinner Service Times Use the frequency...Ch. 2.2 - Wendys Lunch Service Times Use the frequency...Ch. 2.2 - Wendys Dinner Service Times Use the frequency...Ch. 2.2 - Analysis of Last Digits Use the frequency...Ch. 2.2 - Analysis of Last Digits Use the frequency...Ch. 2.2 - Back-to-Back Relative Frequency Histograms When...Ch. 2.2 - Interpreting Normal Quantile Plots Which of the...Ch. 2.3 - Body Temperatures Listed below are body...Ch. 2.3 - Voluntary Response Data If we have a large...Ch. 2.3 - Ethics There are data showing that smoking is...Ch. 2.3 - CVDOT Section 2-1 introduced important...Ch. 2.3 - Dotplots. In Exercises 5 and 6, construct the...Ch. 2.3 - Diastolic Blood Pressure Listed below are...Ch. 2.3 - Stem plots. In Exercises 7 and 8, construct the...Ch. 2.3 - Stemplots. In Exercises 7 and 8, construct the...Ch. 2.3 - Time-Series Graphs. In Exercises 9 and 10,...Ch. 2.3 - Time-Series Graphs. In Exercises 9 and 10,...Ch. 2.3 - Pareto Charts. In Exercises 11 and 12 construct...Ch. 2.3 - Pareto Charts. In Exercises 11 and 12 construct...Ch. 2.3 - Pie Charts. In Exercises 13 and 14, construct the...Ch. 2.3 - Pie Charts. In Exercises 13 and 14, construct the...Ch. 2.3 - Frequency Polygon. In Exercises 15 and 16,...Ch. 2.3 - Frequency Polygon. In Exercises 15 and 16,...Ch. 2.3 - Self-Driving Vehicles In a survey of adults,...Ch. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.3 - Expanded Stemplots A stemplot can be condensed by...Ch. 2.4 - Linear Correlation In this section we use r to...Ch. 2.4 - Causation A study has shown that there is a...Ch. 2.4 - Scanerplot What is a scatterplot and how does it...Ch. 2.4 - Estimating r For each of the following, estimate...Ch. 2.4 - Scatterplot. In Exercises 5-8, use the sample data...Ch. 2.4 - Scatterplot. In Exercises 5-8, use the sample data...Ch. 2.4 - Scatterplot. In Exercises 5-8, use the sample data...Ch. 2.4 - Scatterplot. In Exercises 5-8, use the sample data...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Using the data from Exercise 8 Heights of Fathers...Ch. 2.4 - Prob. 13BBCh. 2.4 - P-Values In Exercises 13-16, write a statement...Ch. 2.4 - P-Values In Exercises 13-16, write a statement...Ch. 2.4 - P-Values In Exercises 13-16, write a statement...Ch. 2 - Cookies Refer to the accompanying frequency...Ch. 2 - Cookies Using the same frequency distribution from...Ch. 2 - Cookies Using the same frequency distribution from...Ch. 2 - Cookies A stemplot of the same cookies summarized...Ch. 2 - Computers As a quality control manager at Texas...Ch. 2 - Distribution of Wealth In recent years, there has...Ch. 2 - Health Test In an investigation of a relationship...Ch. 2 - Lottery In Floridas Play 4 lottery game, four...Ch. 2 - Seatbelts The Beams Seatbelts company...Ch. 2 - Seatbelts A histogram is to be constructed from...Ch. 2 - Frequency Distribution of Body Temperatures...Ch. 2 - Histogram of Body Temperatures Construct the...Ch. 2 - Dotplot of Body Temperatures Construct a dotplot...Ch. 2 - Stemplot of Body Temperatures Construct a stemplot...Ch. 2 - Body Temperatures Listed below are the...Ch. 2 - Environment a. After collecting the average (mean)...Ch. 2 - Its Like Time Do This Exercise In a Marist survey...Ch. 2 - Whatever Use the same data from Exercise 7 to...Ch. 2 - In Exercises 1-6 refer to the data below, which...Ch. 2 - Frequency Distribution For the frequency...Ch. 2 - In Exercises 1-6, refer to the data below, which...Ch. 2 - In Exercises 1-6, refer to the data below, which...Ch. 2 - In Exercises 1-6, refer to the data below, which...Ch. 2 - Data Type a. The listed playing times are all...Ch. 2 - It was stated in this chapter that the days of...Ch. 2 - Fast Food Restaurant Drive-Through Service Times:...
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
- Compute the relative risk of falling for the two groups (did not stop walking vs. did stop). State/interpret your result verbally.arrow_forwardMicrosoft Excel include formulasarrow_forwardQuestion 1 The data shown in Table 1 are and R values for 24 samples of size n = 5 taken from a process producing bearings. The measurements are made on the inside diameter of the bearing, with only the last three decimals recorded (i.e., 34.5 should be 0.50345). Table 1: Bearing Diameter Data Sample Number I R Sample Number I R 1 34.5 3 13 35.4 8 2 34.2 4 14 34.0 6 3 31.6 4 15 37.1 5 4 31.5 4 16 34.9 7 5 35.0 5 17 33.5 4 6 34.1 6 18 31.7 3 7 32.6 4 19 34.0 8 8 33.8 3 20 35.1 9 34.8 7 21 33.7 2 10 33.6 8 22 32.8 1 11 31.9 3 23 33.5 3 12 38.6 9 24 34.2 2 (a) Set up and R charts on this process. Does the process seem to be in statistical control? If necessary, revise the trial control limits. [15 pts] (b) If specifications on this diameter are 0.5030±0.0010, find the percentage of nonconforming bearings pro- duced by this process. Assume that diameter is normally distributed. [10 pts] 1arrow_forward
- 4. (5 pts) Conduct a chi-square contingency test (test of independence) to assess whether there is an association between the behavior of the elderly person (did not stop to talk, did stop to talk) and their likelihood of falling. Below, please state your null and alternative hypotheses, calculate your expected values and write them in the table, compute the test statistic, test the null by comparing your test statistic to the critical value in Table A (p. 713-714) of your textbook and/or estimating the P-value, and provide your conclusions in written form. Make sure to show your work. Did not stop walking to talk Stopped walking to talk Suffered a fall 12 11 Totals 23 Did not suffer a fall | 2 Totals 35 37 14 46 60 Tarrow_forwardQuestion 2 Parts manufactured by an injection molding process are subjected to a compressive strength test. Twenty samples of five parts each are collected, and the compressive strengths (in psi) are shown in Table 2. Table 2: Strength Data for Question 2 Sample Number x1 x2 23 x4 x5 R 1 83.0 2 88.6 78.3 78.8 3 85.7 75.8 84.3 81.2 78.7 75.7 77.0 71.0 84.2 81.0 79.1 7.3 80.2 17.6 75.2 80.4 10.4 4 80.8 74.4 82.5 74.1 75.7 77.5 8.4 5 83.4 78.4 82.6 78.2 78.9 80.3 5.2 File Preview 6 75.3 79.9 87.3 89.7 81.8 82.8 14.5 7 74.5 78.0 80.8 73.4 79.7 77.3 7.4 8 79.2 84.4 81.5 86.0 74.5 81.1 11.4 9 80.5 86.2 76.2 64.1 80.2 81.4 9.9 10 75.7 75.2 71.1 82.1 74.3 75.7 10.9 11 80.0 81.5 78.4 73.8 78.1 78.4 7.7 12 80.6 81.8 79.3 73.8 81.7 79.4 8.0 13 82.7 81.3 79.1 82.0 79.5 80.9 3.6 14 79.2 74.9 78.6 77.7 75.3 77.1 4.3 15 85.5 82.1 82.8 73.4 71.7 79.1 13.8 16 78.8 79.6 80.2 79.1 80.8 79.7 2.0 17 82.1 78.2 18 84.5 76.9 75.5 83.5 81.2 19 79.0 77.8 20 84.5 73.1 78.2 82.1 79.2 81.1 7.6 81.2 84.4 81.6 80.8…arrow_forwardName: Lab Time: Quiz 7 & 8 (Take Home) - due Wednesday, Feb. 26 Contingency Analysis (Ch. 9) In lab 5, part 3, you will create a mosaic plot and conducted a chi-square contingency test to evaluate whether elderly patients who did not stop walking to talk (vs. those who did stop) were more likely to suffer a fall in the next six months. I have tabulated the data below. Answer the questions below. Please show your calculations on this or a separate sheet. Did not stop walking to talk Stopped walking to talk Totals Suffered a fall Did not suffer a fall Totals 12 11 23 2 35 37 14 14 46 60 Quiz 7: 1. (2 pts) Compute the odds of falling for each group. Compute the odds ratio for those who did not stop walking vs. those who did stop walking. Interpret your result verbally.arrow_forward
- Solve please and thank you!arrow_forward7. In a 2011 article, M. Radelet and G. Pierce reported a logistic prediction equation for the death penalty verdicts in North Carolina. Let Y denote whether a subject convicted of murder received the death penalty (1=yes), for the defendant's race h (h1, black; h = 2, white), victim's race i (i = 1, black; i = 2, white), and number of additional factors j (j = 0, 1, 2). For the model logit[P(Y = 1)] = a + ß₁₂ + By + B²², they reported = -5.26, D â BD = 0, BD = 0.17, BY = 0, BY = 0.91, B = 0, B = 2.02, B = 3.98. (a) Estimate the probability of receiving the death penalty for the group most likely to receive it. [4 pts] (b) If, instead, parameters used constraints 3D = BY = 35 = 0, report the esti- mates. [3 pts] h (c) If, instead, parameters used constraints Σ₁ = Σ₁ BY = Σ; B = 0, report the estimates. [3 pts] Hint the probabilities, odds and odds ratios do not change with constraints.arrow_forwardSolve please and thank you!arrow_forward
- Solve please and thank you!arrow_forwardQuestion 1:We want to evaluate the impact on the monetary economy for a company of two types of strategy (competitive strategy, cooperative strategy) adopted by buyers.Competitive strategy: strategy characterized by firm behavior aimed at obtaining concessions from the buyer.Cooperative strategy: a strategy based on a problem-solving negotiating attitude, with a high level of trust and cooperation.A random sample of 17 buyers took part in a negotiation experiment in which 9 buyers adopted the competitive strategy, and the other 8 the cooperative strategy. The savings obtained for each group of buyers are presented in the pdf that i sent: For this problem, we assume that the samples are random and come from two normal populations of unknown but equal variances.According to the theory, the average saving of buyers adopting a competitive strategy will be lower than that of buyers adopting a cooperative strategy.a) Specify the population identifications and the hypotheses H0 and H1…arrow_forwardYou assume that the annual incomes for certain workers are normal with a mean of $28,500 and a standard deviation of $2,400. What’s the chance that a randomly selected employee makes more than $30,000?What’s the chance that 36 randomly selected employees make more than $30,000, on average?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 MCDOUGALGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill

Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL

Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
How to make Frequency Distribution Table / Tally Marks and Frequency Distribution Table; Author: Reenu Math;https://www.youtube.com/watch?v=i_A6RiE8tLE;License: Standard YouTube License, CC-BY
Frequency distribution table in statistics; Author: Math and Science;https://www.youtube.com/watch?v=T7KYO76DoOE;License: Standard YouTube License, CC-BY
Frequency Distribution Table for Grouped/Continuous data | Math Dot Com; Author: Maths dotcom;https://www.youtube.com/watch?v=ErnccbXQOPY;License: Standard Youtube License