Understandable Statistics: Concepts and Methods
12th Edition
ISBN: 9781337119917
Author: Charles Henry Brase, Corrinne Pellillo Brase
Publisher: Cengage Learning
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Textbook Question
Chapter 8.2, Problem 10P
Basic Computation: Testing μ, σ Unknown A random sample has 49 values. The sample
- (a) Check Requirements Is it appropriate to use a Student’s t distribution? Explain. How many degrees of freedom do we use?
- (b) What are the hypotheses?
- (c) Compute the t value of the sample test statistic.
- (d) Estimate the P-value for the test.
- (e) Do we reject or fail to reject H0?
- (f) Interpret the results.
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Use the Wilcoxon signed rank test to test the hypothesis that the median number of pages in the statistics books in the library from which the sample was taken is 400. A sample of 12 statistics books have the following numbers of pages
pages
127
217
486
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397
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What is the sum of the negative ranks (W-)? 75 What is the sum of the positive ranks (W+)? 5What type of test is this? two tailedWhat is the test statistic W? 5 These are the critical values for a 1-tailed Wilcoxon Signed Rank test for n=12
Alpha Level
0.001
0.005
0.01
0.025
0.05
0.1
0.2
Critical Value
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68
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60
56
50
What is the p-value for this test? p-value < 0.001
Chapter 8 Solutions
Understandable Statistics: Concepts and Methods
Ch. 8.1 - Statistical Literacy Discuss each of the following...Ch. 8.1 - Statistical Literacy In a statistical test, we...Ch. 8.1 - Statistical Literacy If we fail to reject (i.e.,...Ch. 8.1 - Statistical Literacy If we reject the null...Ch. 8.1 - Statistical Literacy What terminology do we use...Ch. 8.1 - Prob. 6PCh. 8.1 - Statistical Literacy If the P-value in a...Ch. 8.1 - Statistical Literacy If the P-value in a...Ch. 8.1 - Statistical Literacy Suppose the P-value in a...Ch. 8.1 - Statistical Literacy Suppose the P-value in a...
Ch. 8.1 - Basic Computation: Setting Hypotheses Suppose you...Ch. 8.1 - Basic Computation: Setting Hypotheses Suppose you...Ch. 8.1 - Basic Computation: Find Test Statistic,...Ch. 8.1 - Basic Computation: Find the Test Statistic,...Ch. 8.1 - Veterinary Science: Colts The body weight of a...Ch. 8.1 - Marketing: Shopping Time How much customers buy is...Ch. 8.1 - Meteorology: Storms Weatherwise magazine is...Ch. 8.1 - Chrysler Concorde: Acceleration Consumer Reports...Ch. 8.1 - For Problems 1924, please provide the following...Ch. 8.1 - For Problems 1924, please provide the following...Ch. 8.1 - For Problems 1924, please provide the following...Ch. 8.1 - For Problems 1924, please provide the following...Ch. 8.1 - Prob. 23PCh. 8.1 - Prob. 24PCh. 8.2 - Statistical Literacy For the same sample data and...Ch. 8.2 - Statistical Literacy To test for an x...Ch. 8.2 - Statistical Literacy When using the Students t...Ch. 8.2 - Critical Thinking Consider a test for . If the...Ch. 8.2 - Critical Thinking Consider a test for . If the...Ch. 8.2 - Critical Thinking If sample data is such that for...Ch. 8.2 - Basic Computation: P-value Corresponding to t...Ch. 8.2 - Basic Computation: P-value Corresponding to t...Ch. 8.2 - Basic Computation: Testing , Unknown A random...Ch. 8.2 - Basic Computation: Testing , Unknown A random...Ch. 8.2 - Please provide the following information for...Ch. 8.2 - Please provide the following information for...Ch. 8.2 - Please provide the following information for...Ch. 8.2 - Please provide the following information for...Ch. 8.2 - Please provide the following information for...Ch. 8.2 - Prob. 16PCh. 8.2 - Please provide the following information for...Ch. 8.2 - Prob. 18PCh. 8.2 - Please provide the following information for...Ch. 8.2 - Prob. 20PCh. 8.2 - Prob. 21PCh. 8.2 - Prob. 22PCh. 8.2 - Critical Thinking: One-Tailed versus Two-Tailed...Ch. 8.2 - Prob. 25PCh. 8.2 - Prob. 26PCh. 8.2 - Prob. 27PCh. 8.2 - Prob. 28PCh. 8.2 - Prob. 29PCh. 8.2 - Prob. 30PCh. 8.3 - Statistical Literacy To use the normal...Ch. 8.3 - Statistical Literacy Consider a binomial...Ch. 8.3 - Prob. 3PCh. 8.3 - Critical Thinking An article in a newspaper states...Ch. 8.3 - Basic Computation: Testing p A random sample of 30...Ch. 8.3 - Basic Computation: Testing p A random sample of 60...Ch. 8.3 - Prob. 7PCh. 8.3 - Prob. 8PCh. 8.3 - Prob. 9PCh. 8.3 - For Problems 721, please provide the following...Ch. 8.3 - Prob. 11PCh. 8.3 - For Problems 721, please provide the following...Ch. 8.3 - For Problems 721, please provide the following...Ch. 8.3 - Prob. 14PCh. 8.3 - For Problems 721, please provide the following...Ch. 8.3 - Prob. 16PCh. 8.3 - For Problems 721, please provide the following...Ch. 8.3 - Prob. 18PCh. 8.3 - Prob. 19PCh. 8.3 - Prob. 20PCh. 8.3 - Prob. 21PCh. 8.3 - Prob. 22PCh. 8.3 - Critical Region Method: Testing Proportions Solve...Ch. 8.3 - Prob. 24PCh. 8.4 - Prob. 1PCh. 8.4 - Prob. 2PCh. 8.4 - Prob. 3PCh. 8.4 - Prob. 4PCh. 8.4 - Prob. 5PCh. 8.4 - Prob. 6PCh. 8.4 - Prob. 7PCh. 8.4 - Basic Computation: Paired Differences Test For a...Ch. 8.4 - Prob. 9PCh. 8.4 - Prob. 10PCh. 8.4 - For Problems 921 assume that the distribution of...Ch. 8.4 - For Problems 921 assume that the distribution of...Ch. 8.4 - Prob. 13PCh. 8.4 - Prob. 14PCh. 8.4 - Prob. 15PCh. 8.4 - Prob. 16PCh. 8.4 - For Problems 921 assume that the distribution of...Ch. 8.4 - Prob. 18PCh. 8.4 - Prob. 19PCh. 8.4 - Prob. 20PCh. 8.4 - Prob. 21PCh. 8.4 - Expand Your Knowledge: Confidence Intervals for d...Ch. 8.4 - Prob. 23PCh. 8.4 - Prob. 24PCh. 8.5 - Statistical Literacy Consider a hypothesis test of...Ch. 8.5 - Prob. 2PCh. 8.5 - Prob. 3PCh. 8.5 - Statistical Literacy Consider a hypothesis test of...Ch. 8.5 - Statistical Literacy Consider a hypothesis test of...Ch. 8.5 - Critical Thinking Consider use of a Students t...Ch. 8.5 - Critical Thinking When conducting a test for the...Ch. 8.5 - Critical Thinking When conducting a test for the...Ch. 8.5 - Basic Computation: Testing 1 2 A random sample of...Ch. 8.5 - Basic Computation: Testing 1 2 Two populations...Ch. 8.5 - Basic Computation: Testing 1 2 A random sample of...Ch. 8.5 - Basic Computation: Testing 1 2 Two populations...Ch. 8.5 - Prob. 13PCh. 8.5 - Prob. 14PCh. 8.5 - Please provide the following information for...Ch. 8.5 - Please provide the following information for...Ch. 8.5 - Please provide the following information for...Ch. 8.5 - Please provide the following information for...Ch. 8.5 - Please provide the following information for...Ch. 8.5 - Please provide the following information for...Ch. 8.5 - Prob. 21PCh. 8.5 - Please provide the following information for...Ch. 8.5 - Prob. 23PCh. 8.5 - Prob. 24PCh. 8.5 - Prob. 25PCh. 8.5 - Prob. 26PCh. 8.5 - Prob. 27PCh. 8.5 - Prob. 28PCh. 8.5 - Prob. 29PCh. 8.5 - Prob. 30PCh. 8.5 - Please provide the following information for...Ch. 8.5 - Prob. 32PCh. 8.5 - Prob. 33PCh. 8.5 - Prob. 34PCh. 8.5 - Prob. 35PCh. 8.5 - Prob. 36PCh. 8.5 - Prob. 37PCh. 8.5 - Prob. 38PCh. 8 - Prob. 1CRPCh. 8 - Prob. 2CRPCh. 8 - Critical Thinking All other conditions being...Ch. 8 - Prob. 4CRPCh. 8 - Before you solve each problem below, first...Ch. 8 - Prob. 6CRPCh. 8 - Prob. 7CRPCh. 8 - Prob. 8CRPCh. 8 - Prob. 9CRPCh. 8 - Prob. 10CRPCh. 8 - Prob. 11CRPCh. 8 - Prob. 12CRPCh. 8 - Prob. 13CRPCh. 8 - Prob. 14CRPCh. 8 - Before you solve each problem below, first...Ch. 8 - Prob. 16CRPCh. 8 - Prob. 17CRPCh. 8 - Prob. 18CRPCh. 8 - Discuss each of the following topics in class or...Ch. 8 - Prob. 2LCCh. 8 - Prob. 3LCCh. 8 - Prob. 4LCCh. 8 - Prob. 5LC
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