Answer:
8 hours
1 hour
0.288675
Step-by-step explanation:
We complete the answer as follows;
mu = mean = 8 hours
sigma = standard deviation= 1 hour
Mu_x bar = mu = 8 hours
sigma_x bar = sigma/√(n) = 1/√(12) = 0.288675
x=17
Step-by-step explanation
i just did the exact same question on a test and got it right .
17