According to a 2015 article reported in USA Today, the average age when college-educated students marry...
According to a 2015 article reported in USA Today, the average age when college-educated students marry for the first time is at age 25 years. A random sample of 25 college-educated adults yielded the following information about the ages of when they first married: x̄ = 26.3 years and s = 4.2 years. Consider a test to determine whether the average age when college-educated adults get married has increased.
a. What is your point estimate and standard error for this sample?
b. Using your data find a 98% confidence interval for the mean age when college-educated adults first marry.
c. Using your data find a 90% confidence interval for the mean age when college-educated adults first marry.
d. Other than changing your confidence level percentage, what is one other thing you could do to reduce the width of the confidence interval?
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According to a 2015 article reported in USA Today, the average
age when college-educated students marry...
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