Concept explainers
Flu season: The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season.
- Find the mean and
median number of Type A cases in the first 15 weeks of the flu season. - Find the mean and median number of Type B cases in the first 15 weeks of the flu season.
- A public health official says that there are more than twice as many cases of Type A influenza as Type B. Do these data support this claim?
(a)
To Find: the mean and median number of type A cases.
Answer to Problem 45E
Number of type A cases in first
Explanation of Solution
Given:
Formula used:
Calculation:
Mean and Median number of type A cases in first
For Median, first we have to arrange data in sequential order,
Thus, type A cases in first
(b)
To Find: To Find the mean and median number of type B cases.
Answer to Problem 45E
Number of type B cases in first
Explanation of Solution
Calculation- Mean and Median number of type B cases in first
For Median, arrange data in sequential order, we get,
for odd numbers
Thus, type B cases in first
(c)
To Find: whether there are more than twice as many cases as type A influenza as type B.
Answer to Problem 45E
There are more than twice as many cases of type A influenza as type B.
Explanation of Solution
By looking at the mean median number of type A and type B cases, we get,
Number of type A cases in first
Number of type B cases in first
So, it can be said that there are more than twice as many cases of type A influenza as type B as claimed by a public health official.
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Chapter 3 Solutions
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