A recent internal report indicated that the mean number of miles between oil changes for franchise customers is at least 3,500. One franchise owner conducted a study to determine whether this statement was accurate for his franchise's customers. He selected a simple random sample of 10 customers and determined the number of miles each had driven the car between oil changes. The sample data that were obtained is listed in the accompanying table.
A. use the test statistic approach to test the null hypothesis with ?= 0.01
Table:
3,394
4,192
1,981
2,710
3,286
3,462
3,042
3,351
3,745
3,578
Determine the critical value for α= 0.01 =
Calculate the test statistics
The Test Statistics is ?