Consider the following data:
x | 4 |
---|
5 |
6 |
7 |
8 |
P(X=x) |
---|
0.2 |
0.2 |
0.1 |
0.2 |
0.3 |
Step 3 of 5 :
Find the standard deviation. Round your answer to one decimal place.
x | P(x) | x * P(x) | x2 * P(x) |
4 | 0.2 | 0.8 | 3.2 |
5 | 0.2 | 1 | 5 |
6 | 0.1 | 0.6 | 3.6 |
7 | 0.2 | 1.4 | 9.8 |
8 | 0.3 | 2.4 | 19.2 |
1 | 6.2 | 40.8 |
Standard deviation = =X 2 * P(X) - 2
=40.8 -38.44
=2.36
= 1.5362
Standard deviation = 1.5
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