Concept explainers
Mean for the random variable representing the total number of the calories in the breakfast.
Answer to Problem 73E
The mean of T is 180.
Explanation of Solution
Given information:
For 1 − ounce breakfast cereal:
Mean,
Variance,
For cup of whole milk:
Mean,
Variance,
Calculations:
If X and Y are independent,
Property mean:
Property variance:
Since T represents the total number of calories in breakfast (1 ounce of the cereal and half cup of whole milk).
Then
Thus,
We have
Mean of T ,
Variance of T ,
Chapter 6 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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