Find the standard deviation for each data set Use standard

:

Find the standard deviation for each data set. Use standard deviations from eac set to compare the data sets.

1. Fastest times of cheetahs(mph)

75,50 25,35,35,25, 30, 50, 20

2. Fastest speed of some birds on flight (mph)

220, 104,92,55,65,36,55,29,53,25,30,20

The std deviation of the cheetahs is ?

The standard deviation of the birds of flight is?

The standard deviations of the two data sets show the fastest speeds of the cheetahs deviate more / less? From the mean of the fastest birds?

Solution

Total Numbers

8

Mean (Average)

661.875

Standard deviation

1763.05323

Variance(Standard deviation)

3108356.69643

Population Standard deviation

1649.18529

Total Numbers

12

Mean (Average)

65.33333

Standard deviation

55.27178

Variance(Standard deviation)

3054.9697

Population Standard deviation

52.9187

Variance(Population Standard deviation)

2800.38889

Std dev of cheetah = 1649.18529

Std dev of birds = 52.9187

The standard deviations of the two data sets show the fastest speeds of the cheetahs deviate more