Answer:
The value of the test statistic is 
Step-by-step explanation:
The null hypothesis is:

The alternate hypotesis is:

Our test statistic is:

In which X is the sample mean,
is the null hypothesis value,
is the standard deviation and n is the size of the sample.
In this problem:

So



The value of the test statistic is 
Answer:
432
Step-by-step explanation:
Answer:
2x-14
Step-by-step explanation:
2(x-7)
distribute
2x-14
Not quite sure what the question being asked here is.
D answer is 9 , 24/8 = 3
3x3=9