Elementary Statistics Using The Ti-83/84 Plus Calculator
5th Edition
ISBN: 9780134686943
Author: Triola, Mario F., Iossi, Laura
Publisher: Pearson,
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Chapter 2.1, Problem 28BSC
To determine
Construct the frequency distribution for the depths of earthquakes with a sample of 600 magnitudes.
Check whether the frequency distribution appears to be a
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Reconsider the patient satisfaction data in Table 1. Fit a multiple regression model using both patient age and
severity as the regressors.
(a) Test for significance of regression.
(b) Test for the individual contribution of the two regressors. Are both regressor variables needed in the model?
(c) Has adding severity to the model improved the quality of the model fit? Explain your answer.
The output voltage of a power supply is assumed to be normally distributed. Sixteen observations taken at
random on voltage are as follows: 10.35, 9.30, 10.00, 9.96, 11.65, 12.00, 11.25, 9.58, 11.54, 9.95, 10.28, 8.37,
10.44, 9.25, 9.38, and 10.85.
(a) Test the hypothesis that the mean voltage equals 12 V against a two-sided alternative using a = 0.05.
(b) Construct a 95% two-sided confidence interval on μ.
(c) Test the hypothesis that σ² = 11 using α = 0.05.
(d) Construct a 95% two-sided confidence interval on σ.
(e) Construct a 95% upper confidence interval on σ.
(f) Does the assumption of normality seem reasonable for the output voltage?
Analyze the residuals from the regression model on the patient satisfaction data from Exercise 3. Comment on
the adequacy of the regression model.
Chapter 2 Solutions
Elementary Statistics Using The Ti-83/84 Plus Calculator
Ch. 2.1 - Prob. 1BSCCh. 2.1 - Prob. 2BSCCh. 2.1 - Prob. 3BSCCh. 2.1 - Prob. 4BSCCh. 2.1 - Prob. 5BSCCh. 2.1 - Prob. 6BSCCh. 2.1 - Prob. 7BSCCh. 2.1 - Prob. 8BSCCh. 2.1 - Prob. 9BSCCh. 2.1 - Prob. 10BSC
Ch. 2.1 - Prob. 11BSCCh. 2.1 - Prob. 12BSCCh. 2.1 - Prob. 13BSCCh. 2.1 - Prob. 14BSCCh. 2.1 - Prob. 15BSCCh. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Constructing Frequency Distributions. In Exercises...Ch. 2.1 - Prob. 18BSCCh. 2.1 - Prob. 19BSCCh. 2.1 - Relative Frequencies for Comparisons. In Exercises...Ch. 2.1 - Prob. 21BSCCh. 2.1 - Prob. 22BSCCh. 2.1 - Prob. 23BSCCh. 2.1 - Prob. 24BSCCh. 2.1 - Large Data Sets. Exercises 2528 involve large sets...Ch. 2.1 - Prob. 26BSCCh. 2.1 - Prob. 27BSCCh. 2.1 - Prob. 28BSCCh. 2.1 - Prob. 29BBCh. 2.2 - Prob. 1BSCCh. 2.2 - Prob. 2BSCCh. 2.2 - Blood Platelet Counts Listed below are blood...Ch. 2.2 - Prob. 4BSCCh. 2.2 - Interpreting a Histogram. In Exercises 5-8, answer...Ch. 2.2 - Prob. 6BSCCh. 2.2 - Prob. 7BSCCh. 2.2 - Prob. 8BSCCh. 2.2 - Prob. 9BSCCh. 2.2 - Constructing Histograms. In Exercises 916,...Ch. 2.2 - Constructing Histograms. In Exercises 916,...Ch. 2.2 - Constructing Histograms. In Exercises 916,...Ch. 2.2 - Prob. 13BSCCh. 2.2 - Prob. 14BSCCh. 2.2 - Prob. 15BSCCh. 2.2 - Prob. 16BSCCh. 2.2 - Prob. 17BBCh. 2.2 - Prob. 18BBCh. 2.3 - Prob. 1BSCCh. 2.3 - Prob. 2BSCCh. 2.3 - Prob. 3BSCCh. 2.3 - Prob. 4BSCCh. 2.3 - Prob. 9BSCCh. 2.3 - Prob. 10BSCCh. 2.3 - Frequency Polygon. In Exercises 15 and 16,...Ch. 2.3 - Frequency Polygon. In Exercises 15 and 16,...Ch. 2.3 - Prob. 17BSCCh. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.3 - Prob. 19BSCCh. 2.3 - Deceptive Graphs. In Exercises 17-20, identify how...Ch. 2.4 - Linear Correlation In this section we use r to...Ch. 2.4 - Prob. 2BSCCh. 2.4 - Prob. 3BSCCh. 2.4 - Prob. 4BSCCh. 2.4 - Scatterplot. In Exercises 58, use the sample data...Ch. 2.4 - Prob. 6BSCCh. 2.4 - Prob. 7BSCCh. 2.4 - Prob. 8BSCCh. 2.4 - Prob. 9BSCCh. 2.4 - Linear Correlation Coefficient In Exercises 9-12,...Ch. 2.4 - Prob. 11BSCCh. 2.4 - Prob. 12BSCCh. 2.4 - Prob. 13BBCh. 2.4 - P-Values In Exercises 13-16, write a statement...Ch. 2.4 - Prob. 15BBCh. 2.4 - Prob. 16BBCh. 2 - Cookies Refer to the accompanying frequency...Ch. 2 - Cookies Using the same frequency distribution from...Ch. 2 - Prob. 3CQQCh. 2 - Cookies A stemplot of the same cookies summarized...Ch. 2 - Computers As a quality control manager at Texas...Ch. 2 - Prob. 6CQQCh. 2 - Prob. 7CQQCh. 2 - Prob. 8CQQCh. 2 - Prob. 9CQQCh. 2 - Prob. 10CQQCh. 2 - Frequency Distribution of Body Temperatures...Ch. 2 - Prob. 2RECh. 2 - Prob. 5RECh. 2 - Prob. 6RECh. 2 - Prob. 1CRECh. 2 - In Exercises 1-6, refer to the data below, which...Ch. 2 - Prob. 3CRECh. 2 - Prob. 4CRECh. 2 - Prob. 6CRECh. 2 - Prob. 1TPPCh. 2 - Fast Food Restaurant Drive-Through Service Times:...Ch. 2 - Prob. 2FDDCh. 2 - Fast Food Restaurant Drive-Through Service Times:...Ch. 2 - Prob. 4FDDCh. 2 - Prob. 5FDD
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