Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is normally distributed.) Group of answer choices 21.3 < μ < 23.5 21.6 < μ < 23.2 21.4 < μ < 23.4 21.5 < μ < 23.3
Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is normally distributed.) Group of answer choices 21.3 < μ < 23.5 21.6 < μ < 23.2 21.4 < μ < 23.4 21.5 < μ < 23.3
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Use the confidence level and sample data to find a confidence
A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test.
What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is
Group of answer choices
21.3 < μ < 23.5
21.6 < μ < 23.2
21.4 < μ < 23.4
21.5 < μ < 23.3
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