Suppose the expected value of a measurement is 4 cm.
Which set of measurements is the MOST precise?
A. 2 cm, 2 cm, 4 cm, 6 cm
B. 3.0 cm, 2.9 cm, 3.1 cm, 3.1 cm
C. 3.5 cm, 4.0 cm, 4.5 cm, 5.0 cm
D. 6 cm, 8 cm, 5 cm, 9 cm

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)