Acruise ship sailed for 9 hours at a speed of 18 miles per hour. how far did the cruise ship sail?
a. 2 miles
b. 9 miles
c. 152 miles
d. 162 miles

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed