Concept explainers
To find: The critical value for 99% confidence interval. Also, compute the confidence interval.
Answer to Problem 2.3CYU
The confidence interval is (0.21764, 0.23834).
Explanation of Solution
Given:
Number of students ( n ) = 10904
Number of binger drivers ( x ) = 2486
Confidence level = 99%
Formula used:
The formula to compute the confidence interval for population proportion is:
Calculation:
From the standard normal table, the z-score at 99% confidence level is calculated as:
The confidence interval using Ti-83 plus calculator is calculated as:
Thus, the 99% confidence interval is (0.21764, 0.23834).
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