### MS 150 Statistics spring 2004 quiz two • Name:

A Sanyo™ 256T washer forms a whirlpool in the wash tub during the wash cycle. The depth of the center of the whirlpool is proportional to the rotation rate of the water. The following data was recorded.

Depression of surface at whirlpool center
Depth of whirlpool/cm
16
16
16
16
15
15
15
14
14
13
19
18
18
17
17
17
16
16
16
16

For the depth:

1. _________ Determine the sample size n.
2. _________ Determine the minimum.
3. _________ Determine the maximum.
4. _________ Calculate the range.
5. _________ Determine the class width. Use 5 bins.
6. Fill in the following table with the bin upper limits in the first column, the frequencies in the second column, and the relative frequencies in the third column.
Bins Frequency Relative Frequency f/n
_________ _________ _________
_________ _________ _________
_________ _________ _________
_________ _________ _________
_________ _________ _________
Sums: _________ _________
7. Sketch a histogram of the relative frequency data on this paper, using the back if necessary.