Question: Class Mean Standard Deviation N Lower 12.11 2.83 122 Working 13.01 2.91 541 Middle 14.99 2.93 475 Upper 15.44 2.83 34 Assignment 1. What is

Class Mean Standard Deviation N
Lower 12.11 2.83 122
Working 13.01 2.91 541
Middle 14.99 2.93 475
Upper 15.44 2.83 34

Assignment

1. What is the 95% confidence interval for the mean number of years of education for lower-class respondents?

2.. What is the 95% confidence interval for the mean number of years of education for working-class responders?

3. what is the 99% confidence interval for the mean number of years of education for lower-class responders?

4. What is the 99% confidence interval for the number of years of education for middle-class responders?

5. As our confidence in the result increases, how does the size of the confidence interval-change?

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