Author Question: The mean of the sample means and the standard deviation of 50 samples of size 5 taken from a ... (Read 56 times)

anjilletteb · **on:** Jul 24, 2018

The mean of the sample means and the standard deviation of 50 samples of size 5 taken from a production process under control are found to be 300 and 25, respectively. The lower control limit for the x chart is located at:
a. 333.54
b. 289.39
c. 310.61
d. 266.46
e. 342.88

Question 2

Which of the following is not a property of the F distribution?
a. F-distributions are nonsymmetrical.
b. F-distributions have (n - 1) degrees of freedom.
c. F can assume only positive values.
d. There are many F-distributions and each has a different shape.
e. F-distributions are nonsymmetrical and F can assume only positive values.