Concept explainers
(a)
To create a
(a)
Answer to Problem 27E
Explanation of Solution
It is given in the question that wildlife biologists inspect deer taken by hunters and find them carrying ticks that test positive for Lyme disease. Thus, we have,
Let us first check the conditions for the following as:
Random condition: It is satisfied as it is assumed that the sample is randomly selected.
Normal condition: It is satisfied as,
Thus, all the conditions are met. Therefore, now, to find the confidence interval we will use the calculator
Thus, the confidence interval will be as:
(b)
To find out how many deer must they inspect.
(b)
Answer to Problem 27E
Explanation of Solution
It is given in the question that wildlife biologists inspect deer taken by hunters and find them carrying ticks that test positive for Lyme disease. Thus, the confidence interval will be as:
Thus, to find the deer they must inspect we need to find the margin of error as:
Thus, the number of deer they must inspect will be
(c)
To explain what concerns do you have about this sample.
(c)
Explanation of Solution
It is given in the question that wildlife biologists inspect deer taken by hunters and find them carrying ticks that test positive for Lyme disease. Thus, the confidence interval will be as:
Thus, the sample may not be random or representative. Deer that may legally be hunted may not be representative of all sexes and ages.
Chapter 19 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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