Concept explainers
(a)
To explain how the graph illustrates the concept of sampling variability.
(a)
Explanation of Solution
Sampling variability is how much an estimate varies between samples i.e. how much the estimate varies from the true result. By looking at the graph above we can say that the graph is approximately symmetrically skewed as both the left and right side of the graph looks the same. From this we can say that the mean of the data is approximately in the middle of the graph. And we know that the true population has the graph skewed symmetrically only and thus the mean is in the middle of it. Thus, the graph illustrate the concept of sampling variability as we can compare the graph with the true population by the position of the mean.
(b)
To explain is there convincing evidence that fewer than
(b)
Answer to Problem 98E
Yes.
Explanation of Solution
Yes, there is convincing evidence that fewer than
Chapter 4 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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