Additional Information and Full Hypothesis Test Examples · Exercise 55

Instructions: For the following ten exercises,
Hypothesis testing: For the following ten exercises, answer each question.

According to the U.S. Census Bureau, the mean family size in the U.S. is 3.13. A sample of a college math class resulted in the following family sizes:

• 5
• 4
• 5
• 4
• 4
• 3
• 6
• 4
• 3
• 3
• 5
• 5
• 6
• 3
• 3
• 2
• 7
• 4
• 5
• 2
• 2
• 2
• 3
• 2

At α = 0.05 level, is the class’ mean family size greater than the national average? Does the census result remain valid? Why?

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Statistics 2e · §9.5 Additional Information and Full Hypothesis Test Examples · Exercise 55