For the following data and for each beach,

• Create a frequency table of its recorded wave heights.

• Find the mean, median, and mode.

• Find the variance and standard deviation (use n – 1 in the division step because we drew a sample of waves for the wave-height measurement).

• Find the range.

a) On Playa Mansa, a sample of 50 waves had the following wave heights: 20 waves were

.25 meters, 3 waves were .35 meters, 22 waves were .40 meters, and 5 waves were .30 meters.

b) On Playa Brava, a sample of 40 waves had the following heights: 30 were .1 meters, 3 were .15 meters, 3 were .2 meters, and 4 were 2 meters.

c) At which beach would you feel more secure?

d) For an uncertain swimmer, which is the best information about wave heights? Mean, median, mode, standard deviation, or maximum?