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?
For each situation below, determine the confidence
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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