Statistics for Management and Economics (Book Only)
11th Edition
ISBN: 9781337296946
Author: Gerald Keller
Publisher: Cengage Learning
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Chapter 13.A, Problem 1E
To determine
Calculate the t value and p value.
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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).
Note:
If your answer does not exactly match the correct choice, it is due to rounding of intermediate calculations. To
avoid the discrepancy, do your calculations in Excel without rounding.
A life insurance company wishes to examine the relationship between the amount of life insurance held by a
family and family income. From a random sample of households, the company collected the accompanying
data. The data are in units of thousands of dollars.
INSUR
INCOME
97
38
141
29
y =
X =
Let
INSUR
280
75
%3D
INCOME
303
81
453
137
357
77
199
43
251
53
807
184
147
45
272
70
537
128
527
117
245
55
483
116
673
204
194
46
154
51
163
48
2
The denominator of the slope coefficient formula for the estimated regression equation is:
108,450.87
280
69
a
507
140
b
105,805.73
464
136
103,225.10
321
71
d
100,707.41
873
206
476
144
574
111
251
65
497
130
826
171
133
32
259
82
281
73
446
146
332
77
219
48
208
55
180
48
169
42
273
69
502
127
547
126
281
80
428
143
370
77
221
49
214
51
A company is considering an organizational change which entails adopting the use of self-managed work teams which they hope will lead to higher levels of employee satisfaction. In order to assess the attitudes of employees of the company towards this change a sample of 250 employees was selected and asked whether they favor the institution of self-managed teams. Three responses were allowed: favor, neutral or oppose. The observed frequency of the results of the survey are shown below:
Opinion
Type of Job
Favor
Neutral
Oppose
Total
Hourly Worker
25
40
35
100
Supervision
45
35
20
100
Manager
20
15
15
50
Total
90
90
70
250
Use this data to test the hypothesis that opinion and type of job are independent at the .025 level.
Chapter 13 Solutions
Statistics for Management and Economics (Book Only)
Ch. 13.1 - Prob. 1ECh. 13.1 - Prob. 2ECh. 13.1 - Prob. 3ECh. 13.1 - Prob. 4ECh. 13.1 - Prob. 5ECh. 13.1 - Prob. 6ECh. 13.1 - Prob. 7ECh. 13.1 - Prob. 8ECh. 13.1 - Prob. 9ECh. 13.1 - Prob. 10E
Ch. 13.1 - Prob. 11ECh. 13.1 - Prob. 12ECh. 13.1 - Prob. 13ECh. 13.1 - Prob. 14ECh. 13.1 - Prob. 15ECh. 13.1 - Prob. 16ECh. 13.1 - Prob. 17ECh. 13.1 - Prob. 18ECh. 13.1 - Prob. 19ECh. 13.1 - Prob. 20ECh. 13.1 - Prob. 21ECh. 13.1 - Prob. 22ECh. 13.1 - Prob. 23ECh. 13.1 - Prob. 24ECh. 13.1 - Prob. 25ECh. 13.1 - Prob. 26ECh. 13.1 - Prob. 27ECh. 13.1 - Prob. 28ECh. 13.1 - Prob. 29ECh. 13.1 - Prob. 30ECh. 13.1 - Prob. 31ECh. 13.1 - Prob. 32ECh. 13.1 - Prob. 33ECh. 13.1 - Prob. 34ECh. 13.1 - Prob. 35ECh. 13.1 - Prob. 36ECh. 13.1 - Prob. 37ECh. 13.1 - Prob. 38ECh. 13.1 - Prob. 39ECh. 13.1 - Prob. 40ECh. 13.1 - Prob. 41ECh. 13.1 - Prob. 42ECh. 13.1 - Prob. 43ECh. 13.1 - Prob. 44ECh. 13.1 - Prob. 45ECh. 13.1 - Prob. 46ECh. 13.1 - Prob. 47ECh. 13.1 - Prob. 48ECh. 13.1 - Prob. 49ECh. 13.1 - Prob. 50ECh. 13.1 - Prob. 51ECh. 13.1 - Prob. 52ECh. 13.1 - Prob. 53ECh. 13.1 - Prob. 54ECh. 13.1 - Prob. 55ECh. 13.1 - Prob. 56ECh. 13.1 - Prob. 57ECh. 13.1 - Prob. 58ECh. 13.1 - Prob. 59ECh. 13.1 - Prob. 60ECh. 13.1 - Prob. 61ECh. 13.1 - Prob. 62ECh. 13.1 - Prob. 63ECh. 13.1 - Prob. 64ECh. 13.1 - Prob. 65ECh. 13.1 - Prob. 66ECh. 13.1 - Prob. 67ECh. 13.1 - Prob. 68ECh. 13.1 - Prob. 69ECh. 13.1 - Prob. 70ECh. 13.1 - Prob. 71ECh. 13.1 - Prob. 72ECh. 13.1 - Prob. 73ECh. 13.1 - Prob. 74ECh. 13.1 - Prob. 75ECh. 13.1 - Prob. 76ECh. 13.1 - Prob. 77ECh. 13.1 - Prob. 78ECh. 13.1 - Prob. 79ECh. 13.1 - Prob. 80ECh. 13.2 - Prob. 81ECh. 13.2 - Prob. 82ECh. 13.2 - Prob. 83ECh. 13.2 - Prob. 84ECh. 13.2 - Prob. 85ECh. 13.2 - Prob. 86ECh. 13.2 - Prob. 87ECh. 13.3 - Prob. 88ECh. 13.3 - Prob. 89ECh. 13.3 - Prob. 90ECh. 13.3 - Prob. 91ECh. 13.3 - Prob. 92ECh. 13.3 - Prob. 93ECh. 13.3 - Prob. 94ECh. 13.3 - Prob. 95ECh. 13.3 - Prob. 96ECh. 13.3 - Prob. 97ECh. 13.3 - Prob. 98ECh. 13.3 - Prob. 99ECh. 13.3 - Prob. 100ECh. 13.3 - Prob. 101ECh. 13.3 - Prob. 102ECh. 13.3 - Prob. 103ECh. 13.3 - Prob. 104ECh. 13.3 - Prob. 105ECh. 13.3 - Prob. 106ECh. 13.3 - Prob. 107ECh. 13.3 - Prob. 108ECh. 13.3 - Prob. 109ECh. 13.3 - Prob. 110ECh. 13.3 - Prob. 111ECh. 13.4 - Prob. 112ECh. 13.4 - Prob. 113ECh. 13.4 - Prob. 114ECh. 13.4 - Prob. 115ECh. 13.4 - Prob. 116ECh. 13.4 - Prob. 117ECh. 13.4 - Prob. 118ECh. 13.4 - Prob. 119ECh. 13.4 - Prob. 120ECh. 13.4 - Prob. 121ECh. 13.4 - Prob. 122ECh. 13.4 - Prob. 123ECh. 13.4 - Prob. 124ECh. 13.4 - Prob. 125ECh. 13.4 - Prob. 126ECh. 13.5 - Prob. 127ECh. 13.5 - Prob. 128ECh. 13.5 - Prob. 129ECh. 13.5 - Prob. 130ECh. 13.5 - Prob. 131ECh. 13.5 - Prob. 132ECh. 13.5 - Prob. 133ECh. 13.5 - Prob. 134ECh. 13.5 - Prob. 135ECh. 13.5 - Prob. 136ECh. 13.5 - Prob. 137ECh. 13.5 - Prob. 138ECh. 13.5 - Prob. 139ECh. 13.5 - Prob. 140ECh. 13.5 - Prob. 141ECh. 13.5 - Prob. 142ECh. 13.5 - Prob. 143ECh. 13.5 - Prob. 144ECh. 13.5 - Prob. 145ECh. 13.5 - Prob. 146ECh. 13.5 - Prob. 147ECh. 13.5 - Prob. 148ECh. 13.5 - Prob. 149ECh. 13.5 - Prob. 150ECh. 13.5 - Prob. 151ECh. 13.5 - Prob. 152ECh. 13.5 - Prob. 153ECh. 13.5 - Prob. 154ECh. 13.5 - Prob. 155ECh. 13.5 - Prob. 156ECh. 13.5 - Prob. 157ECh. 13.5 - Prob. 158ECh. 13.5 - Prob. 159ECh. 13.5 - Prob. 160ECh. 13.5 - Prob. 161ECh. 13.5 - Prob. 162ECh. 13.5 - Prob. 163ECh. 13.5 - Prob. 164ECh. 13.5 - Prob. 165ECh. 13.5 - Prob. 166ECh. 13.5 - Prob. 167ECh. 13.5 - Prob. 168ECh. 13.5 - Prob. 169ECh. 13.5 - Prob. 170ECh. 13.5 - Prob. 171ECh. 13.5 - Prob. 172ECh. 13.5 - Prob. 173ECh. 13.5 - Prob. 174ECh. 13.5 - Prob. 175ECh. 13.5 - Prob. 176ECh. 13.5 - Prob. 177ECh. 13.5 - Prob. 178ECh. 13.5 - Prob. 179ECh. 13.5 - Prob. 180ECh. 13.5 - Prob. 181ECh. 13.5 - Prob. 182ECh. 13.5 - Prob. 183ECh. 13.5 - Prob. 184ECh. 13.5 - Prob. 185ECh. 13.5 - Prob. 186ECh. 13.5 - Prob. 187ECh. 13.5 - Prob. 188ECh. 13.5 - Prob. 189ECh. 13.5 - Prob. 190ECh. 13.5 - Prob. 191ECh. 13.5 - Prob. 192ECh. 13.5 - Prob. 193ECh. 13.A - Prob. 1ECh. 13.A - Prob. 2ECh. 13.A - Prob. 3ECh. 13.A - Prob. 4ECh. 13.A - Prob. 5ECh. 13.A - Prob. 6ECh. 13.A - Prob. 7ECh. 13.A - Prob. 8ECh. 13.A - Prob. 9ECh. 13.A - Prob. 10ECh. 13.A - Prob. 11ECh. 13.A - Prob. 12ECh. 13.A - Prob. 13ECh. 13.A - Prob. 14ECh. 13.A - Prob. 15ECh. 13.A - Prob. 16ECh. 13.A - Prob. 17ECh. 13.A - Prob. 18ECh. 13.A - Prob. 19ECh. 13.A - Prob. 20ECh. 13.A - Prob. 21ECh. 13.A - Prob. 22ECh. 13.A - Prob. 23ECh. 13.A - Prob. 24ECh. 13.A - Prob. 25ECh. 13.A - Prob. 26ECh. 13.A - Prob. 27ECh. 13.A - Prob. 28ECh. 13.A - Prob. 29ECh. 13.A - Prob. 30ECh. 13.A - Prob. 31ECh. 13.A - Prob. 32ECh. 13.A - Prob. 33ECh. 13.A - Prob. 34ECh. 13.A - Prob. 35ECh. 13.A - Prob. 36ECh. 13.A - Prob. 37ECh. 13.A - Prob. 38ECh. 13 - Prob. 194CECh. 13 - Prob. 195CECh. 13 - Prob. 196CECh. 13 - Prob. 197CECh. 13 - Prob. 198CECh. 13 - Prob. 199CECh. 13 - Prob. 200CECh. 13 - Prob. 201CECh. 13 - Prob. 202CECh. 13 - Prob. 203CECh. 13 - Prob. 204CECh. 13 - Prob. 205CECh. 13 - Prob. 206CECh. 13 - Prob. 207CECh. 13 - Prob. 208CECh. 13 - Prob. 209CECh. 13 - Prob. 210CECh. 13 - Prob. 211CECh. 13 - Prob. 212CECh. 13 - Prob. 213CECh. 13 - Prob. 214CECh. 13 - Prob. 215CECh. 13 - Prob. 216CECh. 13 - Prob. 217CECh. 13 - Prob. 218CECh. 13 - Prob. 219CECh. 13 - Prob. 220CECh. 13 - Prob. 221CECh. 13 - Prob. 222CECh. 13 - Prob. 223CECh. 13 - Prob. 224CECh. 13 - Prob. 225CECh. 13 - Prob. 226CECh. 13 - Prob. 227CECh. 13 - Prob. 228CECh. 13 - Prob. 229CECh. 13 - Prob. 230CECh. 13 - Prob. 231CECh. 13 - Prob. 232CECh. 13 - Prob. 233CECh. 13 - Prob. 234CECh. 13 - Prob. 235CECh. 13 - Prob. 236CECh. 13 - Prob. 237CECh. 13 - Prob. 238CECh. 13 - Prob. 239CECh. 13 - Prob. 240CECh. 13 - Prob. 241CECh. 13 - Prob. 242CECh. 13 - Prob. 243CECh. 13 - Prob. 244CECh. 13 - Prob. 245CECh. 13 - Prob. 246CECh. 13 - Prob. 247CECh. 13 - Prob. 248CECh. 13 - Prob. 249CECh. 13 - Prob. 250CECh. 13 - Prob. 251CECh. 13 - Prob. 252CECh. 13 - Prob. 253CECh. 13 - Prob. 254CECh. 13 - Prob. 255CECh. 13 - Prob. 256CECh. 13 - Prob. 257CECh. 13 - Prob. 258CECh. 13 - Prob. 259CECh. 13 - Prob. 260CE
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