Question
37 39 35 25 20 37 15 22 28 15 33 31 19 19 19 Question...
| 37 |
| 39 |
| 35 |
| 25 |
| 20 |
| 37 |
| 15 |
| 22 |
| 28 |
| 15 |
| 33 |
| 31 |
| 19 |
| 19 |
| 19 |
Question 13,The following data measures the age of a random sample of 15 individuals in a group of aerobic exercises.
what is the standard deviation?
Homework Answers
Answer #1
To find standard deviation we first need to find sample mean
To find standard deviation
Create the following table.
| data | data-mean | (data - mean)2 |
| 37 | 10.7333 | 115.20372889 |
| 39 | 12.7333 | 162.13692889 |
| 35 | 8.7333 | 76.27052889 |
| 25 | -1.2667 | 1.60452889 |
| 20 | -6.2667 | 39.27152889 |
| 37 | 10.7333 | 115.20372889 |
| 15 | -11.2667 | 126.93852889 |
| 22 | -4.2667 | 18.20472889 |
| 28 | 1.7333 | 3.00432889 |
| 15 | -11.2667 | 126.93852889 |
| 33 | 6.7333 | 45.33732889 |
| 31 | 4.7333 | 22.40412889 |
| 19 | -7.2667 | 52.80492889 |
| 19 | -7.2667 | 52.80492889 |
| 19 | -7.2667 | 52.80492889 |
Find the sum of numbers in the last column to get.
Hence Standard deviation is 
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