Answer:
Test statistic,
(to 3 dp)
Step-by-step explanation:
Deviation, d = x -y
Sample mean for the deviation


Standard deviation: 


SD =2.93
Under the null hypothesis, the formula for the test statistics will be given by:


For this case, we have the following expression:

We simplify the expression:
If we add similar terms, taking into account that different signs are subtracted and the sign of the greater one is placed, we have that 
So, we have to:

Answer:
-3x + x + 5 = -2x + 5
Cause if its only 19 hours worked is that the whole week? in that case itd be 19*5.75 = 109.25
Answer:
The answer is 8.5
Step-by-step explanation:
Just list all the numbers and cross them out one by one.