C2. Average years of education are reported by social class based on data from the GSS 2018.

1. Co ns tru ct the 95% confidence interval for the mean number of years of education for lowerand working-class respondents.

2. Construct the 99% confidence interval for the mean number of years of education for lower-class and middle-class respondents.

3. As our confidence in the result increases, how does the size of the confidence interval Change? Explain why this is so.