A hospital is trying to cut down on emergency room wait times.

Question

A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly surveyed 70 patients. The sample mean was 1.5 hours with a sample standard deviation of 0.5 hours.

Identify the following. (Enter exact numbers as integers, fractions, or decimals.)

(a)    x

(b)    s_x

(c)    n

(d)    n − 1

Answer 1

Hi Nathan,

This question is not asking you to do any calculations, it's just asking you to pick out the mean, standard deviation, and the "n" from the wording of the problem.

So, you're told that the sample mean (x) is 1.5 hours, the standard deviation (s_x) is 0.5 hours, and n=70 - so "n-1" = 69

Hope that helps!

Stephanie