A sample of 15 from a normal population yields a sample mean of 43 and a...
A sample of 15 from a normal population yields a sample mean of 43 and a sample standard deviation of 4.7. The p-value that should be used to test the claim that the population mean is less than 45 is closest to:
Homework Answers
Solution :
The null and alternative hypothesis is ,
H0 : 
= 45
Ha :
< 45
Test statistic (t) =
= (
- 
) / s / 
n
= (43 - 45) / 4.7 /
15
Test statistic = -1.648
P-value = 0.0608
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