In the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how old they were when they had their first child. The average age at first birth for this sample was 24.3, with...

a) What is the value of Z for this confidence interval? b) What is the margin of error for this confidence interval? c) What is the lower/upper bound for this confidence interval?

Extracted text: In the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how old they were when they had their first child. The average age at first birth for this sample was 24.3, with a standard deviation of 5.74. Use these data to calculate a 95% confidence interval for the mean age at first birth in the population, and answer the following questions based on those calculations.