Eight male and eight female collegestudents who have credit cards were surveyed and asked their totalcredit card debt. The responses are given below in dollars:
Males | 1000 | 2100 | 900 | 1200 | 1300 | 500 | 1400 | 700 |
Females | 1300 | 500 | 2000 | 1800 | 1300 | 1000 | 2600 | 1400 |
1. Is this an observational study or a designed experiment?Explain your answer.
2. Is it reasonable to use Welch’s t-test? Explain youranswer.
3. Is there a difference in the mean credit card debt of malesand females? Use ? = 0.10. List out all 5 steps in thehypothesis testing and show your work.
Step 1
Step 2
Step 3
Step 4
Step 5
4. Construct a 90% confidence interval for the difference in themean credit card debt of male and female college students.
LowerBound:Â Â Â Â
Upper Bound:Â Â
