Concept explainers
To find: The proportion of cockroaches that weight between 76 and 84 grams.
Answer to Problem 87E
The required proportion is 95%
Explanation of Solution
Given:
Population mean (µ) = 80
Population standard deviation (s) = 2
Calculation:
Consider, X be the random variable that shows the weight of cockroaches in grams.
The proportion of cockroaches that weight between 76 and 84 grams can be calculated as:
Thus, the required proportion is approximately 95%
Hence, the correct option is (b).
Chapter 2 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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