a.
To define: The parameter µ involved in the setting.
a.
Explanation of Solution
Given:
Formula used:
The formula of confidence interval is:
The parameter µ exhibits the population mean which shows the mean IQ score of all the students that are studying in school.
b.
To explain: The reason of normality condition being satisfied here.
b.
Answer to Problem 5CRE
Because the
Explanation of Solution
For the normality condition to be fulfilled the size of the sample should be above 30. Here, sample size is is 60 which is greater than 30. Thus, the condition of normalityt is fulfilled here.
c.
To construct: The 90% confidence interval
c.
Answer to Problem 5CRE
The confidence interval is (111.79, 118.17)
Explanation of Solution
Calculation:
The obtained confidence interval using Ti-83 calculator is:
Thus, the confidence interval is (111.79, 118.17)
d.
To interpret: The confidence interval.
d.
Explanation of Solution
There is 90% surity that the true mean IQ score of the students would fall between the 111.79 and 118.17.
Chapter 8 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Basic Business Statistics, Student Value Edition
Statistics for Business and Economics (13th Edition)
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Elementary Statistics (13th Edition)
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