A researcher reports that when groups of four children are randomly selected from a population of couples meeting certain criteria, the probability distribution for the number of girls is as given in the table below:
|
Number of Girls X
|
P(X)
|
| 0 |
0.502
|
| 1 |
0.365
|
| 2 |
0.098
|
| 3 |
0.034
|
| 4 |
0.001
|
|
Total
|
1.000
|
What is the standard deviation for the number of girls for this distribution? Round your answer to one place value more than the given data and attach units.
(Hint: The values of X are 0 girls, 1 girl, 2 girls, 3 girls, and 4 girls.)