Concept explainers
(a)
To Explain: the confidence interval.
(a)
Explanation of Solution
Given:
90 percent confidence interval for the
Calculation:
There is confident that there income in new Jersey is between $71612 and $72832 of the true 2015 median household.
(b)
To Explain: the confidence level.
(b)
Explanation of Solution
The 90 percent confidence interval is showing that the population median household income in New Jersey. It implies that it is expecting about 90 percent of all samples is having a 90 percent confidence interval which is having the true population parameter.
Chapter 8 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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