Suppose that a committee is studying whether or not there i

. Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. The committee randomly surveyed 81 people who recently served as jurors. The sample mean wait time was eight hours with a sample standard deviation of four hours.

a.

i. x ¯ = __________

ii. sx = __________

iii. n = __________

iv. n – 1 = __________

Solution

a)

x bar = 8

sx = 4

n = 81

n-1 = 80