>LCPO< FUND OF STATISTICS
5th Edition
ISBN: 9781034509998
Author: Sullivan
Publisher: PEARSON
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Chapter B.5, Problem 15AYU
Elapsed Time to Earn a Bachelor’s Degree Clifford Adelman, a researcher with the Department of Education, followed a cohort of students who graduated from high school in 1992, monitoring the progress the students made toward completing a bachelor’s degree. One aspect of his research was to compare students who first attended a community college to those who immediately attended and remained at a four-year institution. The sample standard deviation time to complete a bachelor’s degree of the 268 students who transferred to a four-year school after attending community college was 1.162. The sample standard deviation time to complete a bachelor’s degree of the 1145 students who immediately attended and remained at a four-year institution was 1.015. Assuming the time to earn a bachelor’s degree is
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Question 2
The data below provides the battery life of thirty eight (38) motorcycle batteries.
100 83 83 105 110 81 114
99 101 105 78 115 74 96
106
89
94 81 106 91 93 86
79 103 94 108 113 100
117 120
77 93
93 85 76
89 78 88
680
a. Test the hypothesis that mean battery life is greater than 90. Use the 1% level of
significance.
b. Determine if the mean battery life is different from 80. Use the 10% level of
significance. Show all steps for the hypothesis test
c. Would your conlcusion in part (b) change at the 5% level of significance? |
d. Confirm test results in part (b) using JASP. Note: All JASP input files and output
tables should be provided
Suppose that 80% of athletes at a certain college graduate. You randomly select eight athletes. What’s the chance that at most 7 of them graduate?
Suppose that you flip a fair coin four times. What’s the chance of getting at least one head?
Chapter B.5 Solutions
>LCPO< FUND OF STATISTICS
Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - For Problems 18, find the critical value(s) for :...Ch. B.5 - In Problems 914, assume that the populations are...Ch. B.5 - In Problems 914, assume that the populations are...
Ch. B.5 - In Problems 914, assume that the populations are...Ch. B.5 - In Problems 914, assume that the populations are...Ch. B.5 - In Problems 914, assume that the populations are...Ch. B.5 - In Problems 914, assume that the populations are...Ch. B.5 - Elapsed Time to Earn a Bachelors Degree Clifford...Ch. B.5 - Prob. 16AYUCh. B.5 - Prob. 17AYUCh. B.5 - SAT Test Scores A researcher wants to know if...Ch. B.5 - Waiting Time in Line McDonalds executives want to...Ch. B.5 - Filling Machines A quality-control engineer wants...Ch. B.5 - Rates of Returns of Stocks Stocks may be...Ch. B.5 - Measuring Reaction Time Researchers at the...
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- Question 1 A tech company has acknowledged the importance of having records of all meetings conducted. The meetings are very fast paced and requires equipment that is able to capture the information in the shortest possible time. There are two options, using a typewriter or a word processor. Fifteen administrative assistants are selected and the amount of typing time in hours was recorded. The results are given below: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 typewriter 8.0 6.5 5.0 6.7 7.8 8.5 7.2 5.7 9.2 5.7 6.5 word processor 7.2 5.7 8.3 7.5 9.2 7.2 6.5 7.0 6.9 34 7.0 6.9 8.8 6.7 8.8 9.4 8.6 5.5 7.2 8.4 a. Test the hypothesis that the mean typing time in hours for typewriters is less than 7.0. Use the 1% level of significance. b. Construct a 90% confidence interval for the difference in mean typing time in hours, where a difference is equal to the typing time in hours of word processors minus typing time in hours of typewriter. c. Using the 5% significance level, determine whether there is…arrow_forwardIllustrate 2/7×4/5 using a rectangular region. Explain your work. arrow_forwardWrite three other different proportions equivalent to the following using the same values as in the given proportion 3 foot over 1 yard equals X feet over 5 yardsarrow_forward
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