For each situation below, determine the confidence interval estimate of the popular parameter. Assume that the results are based on a nationally representative sample. Show your work and express the estimate in a sentence.  a. The average age of 1225 respondents was 25.3 with a standard deviation of 1.9. What is the 95% confidence interval estimate of age in the population?  b. The average number of children for the 945 respondents for which we have information was 1.98 with a standard deviation of 1.04. What is the 90% confidence interval estimate of average number of kids in the population?  c. The average years of school completed for 734 respondents was 11.9 with a standard deviation of 0.5. What is the 99% confidence interval estimate of average years of school in the population?

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Q: 99% confidence interval for the mean of entire student.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.