Concept explainers
(a)
To find: the average high temperature on days.
(a)
Answer to Problem 2E
Explanation of Solution
Given:
Calculation:
For the average high temperature =
Therefore the average high temperature as per the population regression line is
(b)
To find: the percent of high temperature greater than
(b)
Answer to Problem 2E
2.87%
Explanation of Solution
Given:
Formula used:
Calculation:
Average mean
Z score is
Corresponding probability for the greater than
Therefore about 2.87 percent of the days with a low temperature of
(c)
To find: that the slope of the sample regression line be exactly 1.02, yes or not.
(c)
Answer to Problem 2E
No
Explanation of Solution
No, the reason is that the slope of the population regression line is 1.02 and it is predicted that the slope of the regression line of sample is very near to 1.02 but it is not exactly so there would be some sampling variability in a sample.
Chapter 12 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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