For the 36 students in the sample below, the mean height equals 68 inches and the standard deviation equals 4.44 inches.

68 72 62 70 70 72 70 69 71 64 71 68 62 65 65 63 67 62 64 67 63 70 65 63 69 77 66 74 71 69 77 77 65 70 71 60

a. Estimate, with 95 percent confidence, the mean height for all students enrolled in BMGT 230, this

semester.

b. How would the width of the interval in Part a

change if the standard deviation equaled 3.33 inches,

holding all other values/ideas constant?

c. How would the width of the interval in Part a

change if the mean equaled 71 inches, holding all other

values/ideas constant?