Math153 Name: ______________________________

4/06

Project 9: (10 points) Due: on or before Friday, May 5, 2006

Data were taken from a student project “When Will You Say I Do.”

Thirty-one male students at Essex were randomly sampled. The average age at which they planned to marry (or got married) was 27.71 years with a standard deviation of 2.56 years.

1) Test the hypothesis, at the 5% significance level, that m (the average planned marriage age for male Essex students) = 25 years.

Use Minitab14 (Stat, Basic Statistics, 1-sample t, Summarized data). Use your print-out to complete the following items.

H₀: ________________________

H_A: ________________________

1. a = _______

2. Test statistic ________________

p-value ____________________

3. Conclusion: ____________________________________________

4. State the conclusion in your own words.

2) Use Minitab to find a 95% confidence interval for m , the average age at which male Essex students plan to marry.

______________ TO ______________

3) Is your result consistent with the hypothesis test in part (1)? _______

4) Submit Minitab print-out for parts 1) and 2).