Question

H0; u= 15
Ha: u not equal 15

A sample of 40 provided a sample mean of 14.16 . The population standard deviation is 4 . Enter negative value as negative number.

1 What is the p-value (to 4 decimals)? Use the value of the test statistic rounded to 2 decimal places in your calculations.

2 State the rejection rule: Reject H0 if z is - ________the lower critical value and is ________ the upper critical value.

Answer 1

Solution :

Given that,

This is a two tailed test.

The test statistic is,

Z=-1. 33

1)P-value =0.1836

2)p-value is greater than the level of significance, then faisfato reject the null hyhypothes.

LoweL critical value =-0. 0918

Upper critical value =0.0918