Statistics for Management and Economics (Book Only)
11th Edition
ISBN: 9781337296946
Author: Gerald Keller
Publisher: Cengage Learning
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Chapter 15.A, Problem 7E
To determine
Test hypothesis.
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2. Based on past records, it is generally believed that on an average, a typical University of Technology and Applied Sciences, Nizwa student spends about 25 hours in the LRC per week. Recently, the library has been shifted to a new location which is further away from the academic block. As a result, the administration feels that students may be spending less time in the library. Accordingly a random sample of 41 students were selected and the average number of hours they spend in the library came out to be 16.78 with a standard deviation of 5.17. Carry out an appropriate test of hypotheses for the above problem to test whether the shifting of the library has adversely impacted the study time in the population of all students. (You may assume that study times/week approximately follow a normal distribution in the population).
OA large city hospital conducted a study to investigate the relationship between the number of unauthorized days that employees are absent per year and the
distance (miles) between home and work for the employees. A sample of 10 employees was selected and the following data were collected.
D Excel file: data14-13.xlsx
Distance to Work
Number of Days
(miles)
Absent
8.
8.
9.
8
6.
10
12
14
14
4
18
If required, enter negative values as negative numbers.
a. Select the correct scatter diagram for these data.
A.
Number of Days Absent
10+
8+ .
6-
2+
8.
10
12
14
16
18
20
Distance to Work (miles)
4.
6.
Imagine that I wanted to test the proposition that people think older politicians are more trustworthy. I recruited an internet sample of 90 people. Each person was asked to read a short article about a hypothetical political candidate. Random assignment determined whether the subjects were told that candidate was 65 or whether they were told that candidate was 35. After reading the article, all subjects used a 10-point scale to rate the candidate on competence, trustworthiness, and likability.
I take the mean values of trustworthiness in each group, perform a difference of means test, and find a test statistic of 1.04. Should I reject the null at the 99% confidence level? Why or why not? What does that mean?
Chapter 15 Solutions
Statistics for Management and Economics (Book Only)
Ch. 15.1 - Prob. 1ECh. 15.1 - Prob. 2ECh. 15.1 - Prob. 3ECh. 15.1 - Prob. 4ECh. 15.1 - Prob. 5ECh. 15.1 - Prob. 6ECh. 15.1 - Prob. 7ECh. 15.1 - Prob. 8ECh. 15.1 - Prob. 9ECh. 15.1 - Prob. 10E
Ch. 15.1 - Prob. 11ECh. 15.1 - Prob. 12ECh. 15.1 - Prob. 13ECh. 15.1 - Prob. 14ECh. 15.1 - Prob. 15ECh. 15.1 - Prob. 16ECh. 15.1 - Prob. 17ECh. 15.1 - Prob. 18ECh. 15.1 - Prob. 19ECh. 15.1 - Prob. 20ECh. 15.1 - Prob. 21ECh. 15.1 - Prob. 22ECh. 15.1 - Prob. 23ECh. 15.1 - Prob. 24ECh. 15.1 - Prob. 25ECh. 15.2 - Prob. 26ECh. 15.2 - Prob. 27ECh. 15.2 - Prob. 28ECh. 15.2 - Prob. 29ECh. 15.2 - Prob. 30ECh. 15.2 - Prob. 31ECh. 15.2 - Prob. 32ECh. 15.2 - Prob. 33ECh. 15.2 - Prob. 34ECh. 15.2 - Prob. 35ECh. 15.2 - Prob. 36ECh. 15.2 - Prob. 37ECh. 15.2 - Prob. 38ECh. 15.2 - Prob. 39ECh. 15.2 - Prob. 40ECh. 15.2 - Prob. 41ECh. 15.2 - Prob. 42ECh. 15.2 - Prob. 43ECh. 15.2 - Prob. 44ECh. 15.2 - Prob. 45ECh. 15.2 - Prob. 46ECh. 15.2 - Prob. 47ECh. 15.2 - Prob. 48ECh. 15.2 - Prob. 49ECh. 15.2 - Prob. 50ECh. 15.2 - Prob. 51ECh. 15.2 - Prob. 52ECh. 15.2 - Prob. 53ECh. 15.2 - Prob. 54ECh. 15.2 - Prob. 55ECh. 15.2 - Prob. 56ECh. 15.2 - Prob. 57ECh. 15.2 - Prob. 58ECh. 15.2 - Prob. 59ECh. 15.2 - Prob. 60ECh. 15.2 - Prob. 61ECh. 15.2 - Prob. 62ECh. 15.2 - Prob. 63ECh. 15.2 - Prob. 64ECh. 15.2 - Prob. 65ECh. 15.2 - Prob. 66ECh. 15.2 - Prob. 67ECh. 15.2 - Prob. 68ECh. 15.2 - Prob. 69ECh. 15.2 - Prob. 70ECh. 15.2 - Prob. 71ECh. 15.2 - Prob. 72ECh. 15.2 - Prob. 73ECh. 15.2 - Prob. 74ECh. 15.2 - Prob. 75ECh. 15.2 - Prob. 76ECh. 15.2 - Prob. 77ECh. 15.2 - Prob. 78ECh. 15.4 - Prob. 79ECh. 15.4 - Prob. 80ECh. 15.4 - Prob. 81ECh. 15.4 - Prob. 82ECh. 15.4 - Prob. 83ECh. 15.4 - Prob. 84ECh. 15.4 - Prob. 85ECh. 15.A - Prob. 1ECh. 15.A - Prob. 3ECh. 15.A - Prob. 4ECh. 15.A - Prob. 5ECh. 15.A - Prob. 6ECh. 15.A - Prob. 7ECh. 15.A - Prob. 8ECh. 15.A - Prob. 9ECh. 15.A - Prob. 10ECh. 15.A - Prob. 11ECh. 15.A - Prob. 12ECh. 15.A - Prob. 13ECh. 15.A - Prob. 14ECh. 15.A - Prob. 15ECh. 15.A - Prob. 16ECh. 15.A - Prob. 17ECh. 15.A - Prob. 18ECh. 15.A - Prob. 19ECh. 15.A - Prob. 20ECh. 15.A - Prob. 21ECh. 15.A - Prob. 22ECh. 15.A - Prob. 23ECh. 15.A - Prob. 24ECh. 15.A - Prob. 25ECh. 15.A - Prob. 26ECh. 15.A - Prob. 27ECh. 15.A - Prob. 28ECh. 15.A - Prob. 29ECh. 15.A - Prob. 30ECh. 15.A - Prob. 31ECh. 15.A - Prob. 32ECh. 15.A - Prob. 33ECh. 15.A - Prob. 34ECh. 15.A - Prob. 35ECh. 15.A - Prob. 36ECh. 15.A - Prob. 37ECh. 15.A - Prob. 38ECh. 15.A - Prob. 39ECh. 15.A - Prob. 40ECh. 15.A - Prob. 41ECh. 15.A - Prob. 42ECh. 15.A - Prob. 43ECh. 15 - Prob. 86CECh. 15 - Prob. 87CECh. 15 - Prob. 88CECh. 15 - Prob. 89CECh. 15 - Prob. 90CECh. 15 - Prob. 91CECh. 15 - Prob. 92CECh. 15 - Prob. 93CECh. 15 - Prob. 94CECh. 15 - Prob. 95CECh. 15 - Prob. 96CECh. 15 - Prob. 97CECh. 15 - Prob. 98CECh. 15 - Prob. 99CECh. 15 - Prob. 100CECh. 15 - Prob. 101CECh. 15 - Prob. 102CECh. 15 - Prob. 103CECh. 15 - Prob. 104CECh. 15 - Prob. 105CECh. 15 - Prob. 106CECh. 15 - Prob. 107CECh. 15 - Prob. 108CECh. 15 - Prob. 109CECh. 15 - Prob. 110CECh. 15 - Prob. 111CE
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