A researcher is collecting data about age of students at a prestige university. The data listed below represents a random sample of ages by 40 students at a university. Find a point estimate of the population mean.

20, 26, 18, 18, 21, 19, 31, 23, 21, 19, 27, 20, 20, 25, 31, 24, 20, 21, 19, 26, 22, 20, 23, 23, 22, 21, 19, 24, 24, 26, 27, 28, 20, 19, 23, ,32, 29, 23, 25, 27

Based on this sample data, use StatCrunch to construct a 98% Confidence Intervals for the mean age of all students at this university. Interpret, in words, the meaning of the 98% confidence interval you just computed.

• Step 1: Replace the last data value with your age.
• Step 2: Enter the data in Statcrunch. Click the menu sequence StatT Stats One Sample With Data.
  • Populations Standard Deviation Unknown
• Step 3: In the One Sample Twindow that displays:
  • In the Select columns box, select ages.
  • In the Perform section, select Confidence Interval.
  • In the Level box, type 0.98.
  • Click Compute to display the confidence interval.
• Step 4: Show all work clearly by stating the confidence interval and interpret the meaning of the 98% confidence interval you just computed.