## Rory suspects that teachers in his school district have less than 5 yearſ of experience on average. He decided to test Ha :u= 5 versus

Question

Rory suspects that teachers in his school district have less than 5 yearſ of experience on average. He
decided to test Ha :u= 5 versus H : u < 5 using a sample of 25 teachers. His sample mean was 4
years and his sample standard deviation was 2 years.

in progress 0
2 weeks 2021-09-10T12:45:56+00:00 1 Answer 0

Teachers in his school district have less than 5 yearſ of experience on average is true.

Step-by-step explanation:

Sample mean =

Sample standard deviation = s = 2

We are supposed to to test Ha :u= 5 versus H : u < 5 using a sample of 25 teachers

n = 25

Since n<30 and population standard deviation is unknown

So, we will use t test

Formula :

t=-2.5

Degree of freedom = n-1 = 25-1 = 24

Refer the t table

t critical > t calculated

So, We are failed to reject null hypothesis

So,  teachers in his school district have less than 5 yearſ of experience on average is true.