Question

Question 21 In a study of distances traveled by buses before the first major engine failure, a sample of 209 buses results in a mean of 96.700 miles and a standard deviation of 37.500 miles Calculate the appropriate test statistic to test the claim that the mean distance traveled before a major engine failure is more than 10.000 miles when the level of significance is 0.05 247 258 1.96 1545 -1645

Answer 1

Claim: $\mu$ > 90000

This is right tailed test.

Test statistics

t = (
T
- $\mu$ ) / ( S / sqrt(n) )

= (96700 - 90000) / ( 37500 / sqrt ( 209) )

= 2.58