How many repair records should be sampled if GM wants the population mean number of miles driven until transmission failure to be estimated with a Margin of Error of 5000 miles? Please use 96% confidence level. You will have to calculate this manually.
GM is interested is interested in learning more about customer satisfaction with the performance of one of their automobiles. Several customers appear to be unhappy and have complained about early transmission failures. To learn more about this problem, GM wants to estimate the “Average Miles driven” before the failure occurred. For this GM used a random sample of actual transmission repairs on cars from their domestic dealerships. Following data (sent to you as a separate EXCEL file via e-mail) shows the actual number of miles driven at the time of transmission failure for 50 randomly chosen vehicles.
- How many repair records should be sampled if GM wants the population
mean number of miles driven until transmission failure to be estimated with a Margin of Error of 5000 miles? Please use 96% confidence level. You will have to calculate this manually.
|
85,092 |
32,609 |
59,465 |
77,437 |
32,534 |
64,090 |
32,464 |
59,902 |
|
39,323 |
89,641 |
94,219 |
116,803 |
92,857 |
63,436 |
65,605 |
85,861 |
|
64,342 |
61,978 |
67,998 |
59,817 |
101,769 |
95,774 |
121,352 |
69,568 |
|
74,276 |
66,998 |
40,001 |
72,069 |
25,066 |
77,098 |
69,922 |
35,662 |
|
74,425 |
67,202 |
118,444 |
53,500 |
79,294 |
64,544 |
86,813 |
116,269 |
|
37,831 |
89,341 |
73,341 |
85,288 |
138,114 |
53,402 |
85,586 |
82,256 |
|
77,539 |
88,798 |
|
|
|
|
|
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