Find the variance of the following data. Round your answer to one decimal place.
x | 7 | 8 | 9 | 10 | 11 |
---|---|---|---|---|---|
P(X=x) | 0.1 | 0.2 | 0.2 | 0.3 | 0.2 |
Solution
x | P(x) | x * P(x) | x2 * P(x) |
7 | 0.1 | 0.7 | 4.9 |
8 | 0.2 | 1.6 | 12.8 |
9 | 0.2 | 1.8 | 16.2 |
10 | 0.3 | 3 | 30 |
11 | 0.2 | 2.2 | 24.2 |
Sum | 1 | 9.3 | 88.1 |
Mean =
X * P(X)
= 9.3
Variance =
=
X 2 * P(X) -
2
= 88.1 - (9.3)2 = 1.6
Find the variance of the following data. Round your answer to one decimal place. x34567P(X=x)0.10.30.10.20.3
Consider the following data: x 5 6 7 8 9 P(X=x)P(X=x) 0.3 0.1 0.1 0.3 0.2 Copy Data Step 2 of 5 : Find the variance. Round your answer to one decimal place.
Consider the following data: x678910P(X=x)0.30.20.10.10.3Step 1 of 5: Find the expected value E(X). Round your answer to one decimal place.
x 7 8 9 10 11 P(X = x) 0.3 0.1 0.2 0.1 0.3 Step 2 of 5: Find the variance. Round your answer to one decimal place.
Consider the following data: x 6 7 8 9 10 P(X=x) 0.1 0.3 0.1 0.1 0.4 Step 1 of 5: Find the expected value E(X). Round your answer to one decimal place. Step 2 of 5: Find the variance. Round your answer to one decimal place Step 3 of 5: Find the standard deviation. Round your answer to one decimal place Step 4 of 5: Find the value of P(X<9)P(X<9). Round your answer to one decimal place. Step 5 of...
Consider the following data: x 5 6 7 8 9 P(X=x)P(X=x) 0.3 0.1 0.1 0.3 0.2 Copy Data Step 4 of 5 : Find the value of P(X≤9). Round your answer to one decimal place.
Consider the following data: x 5 6 7 8 9 P(X=x)P(X=x) 0.3 0.1 0.1 0.3 0.2 Copy Data Step 1 of 5 : Find the expected value E(X). Round your answer to one decimal place.
Consider the following data: x-5-4-3-2-1P(X=x)0.20.30.20.10.2Step 2 of 5: Find the variance. Round your answer to one decimal place
x 7 8 9 10 11 P(X = x) 0.3 0.1 0.2 0.1 0.3 Step 3 of 5: Find the standard deviation. Round your answer to one decimal place.
Question 15 of 16, Step 1 of 1 13/24 Correct Find the expected value E(X) of the following data. Round your answer to one decimal place. 6 0.1 7 0.2 8 0.3 9 0.2 10 0.2 P(X = x) answer low to enter your answer