Question

data: (copy and paste in excel to view columns in alignment)

Sample   Repair Time (days)
1   12
2   17
3   9
4   16
5   10
6   18
7   12
8   14
9   15
10   14
11   14
12   8
13   11
14   10
15   8
16   8
17   14
18   12
19   14
20   13
21   12
22   15
23   15
24   10
25   24
26   17
27   13
28   15
29   13
30   15
31   36
32   40
33   13
34   9
35   12
36   13
37   34
38   11
39   8
40   9
41   19
42   14
43   8
44   11
45   12
46   13
47   12
48   10
49   19
50   14
51   12
52   16
53   10
54   26
55   14
56   17
57   15
58   19
59   13
60   12
61   17
62   6
63   13
64   14
65   14
66   13
67   8
68   14
69   17
70   12
71   18
72   15
73   18
74   12
75   16
76   23
77   13
78   18
79   9
80   15
81   8
82   8
83   24
84   11
85   12
86   9
87   14
88   13
89   8
90   15
91   22
92   21
93   19
94   13
95   33
96   11
97   28
98   32
99   15
100   11
101   19
102   5
103   14
104   21
105   12
106   14
107   17
108   13
109   11
110   14
111   14
112   32
113   11
114   14
115   15
116   14
117   11
118   14
119   15
120   14
121   37
122   21
123   13
124   12
125   9
126   15
127   12
128   12
129   14
130   14
131   12
132   9
133   13
134   11
135   20
136   17
137   15
138   19
139   13
140   5
141   14
142   19
143   13
144   11
145   16
146   14
147   17
148   24
149   19
150   14
151   16
152   12
153   17
154   16
155   10
156   5
157   19
158   16
159   15
160   19
161   10
162   13
163   6
164   16
165   18
166   8
167   20
168   30
169   11
170   14
171   17
172   8
173   14
174   8
175   17
176   14
177   8
178   20
179   14
180   14
181   10
182   20
183   15
184   27
185   8
186   5
187   6
188   26
189   14
190   13
191   16
192   12
193   16
194   36
195   13
196   12
197   14
198   21
199   16
200   17

A computer repair firm believes that its average repair time is less than two weeks. Using the accompanying data that gives the computer repair times in days, determine if the company can continue to support this claim. Use a level of significance of 0.05. Click the icon to view the computer repair times. Is there sufficient evidence at the 0.05 level of significance that the average repair time is less than two weeks? Determine the null hypothesis, Ho, and the alternative hypothesis, H4. Hoi d ays H: Vydays (Type integers or decimals. Do not round.) Compute the test statistic. | (Round to two decimal places as needed.) Find the p-value for the test. (Round to three decimal places as needed.) State the conclusion. the chosen value of a, so the null hypothesis. There is evidence to conclude that the average repair time is The p-value is less than two weeks.

Answer 1

Ho: M = 14 days Hi u L 14 days Test statistics X-Mo Olag - 14.855-14 5.9978 V200 & 2015 P-value for this a 0.02257 The paralue is less that value of a so Rejed the Null hypothesis. share is enough evidence to conclude that w the average reepair time is. less that 2 weeks.