H 0 : μ ≥ 25 H 1 : μ < 25 Your sample consists of 28 subjects, with a mean of 23.2 and standard deviation of 8.6. Calculate the test statistic, rounded to 2 decimal places.

The test statistic would be given by:

 (1)  

And replacing we got:

Step-by-step explanation:

Information given

represent the sample mean

represent the sample standard deviation

sample size  

represent the value that we want to test

t would represent the statistic

System of hypothesis

We want to test if the true mean is lower than 25, the system of hypothesis would be:  

Null hypothesis:  

Alternative hypothesis:  

The test statistic would be given by:

 (1)  

And replacing we got:

it could 14.28 but if its not that one then it has to be the 17 one. hope this ! : )

step-by-step explanation: