Additional Information and Full Hypothesis Test Examples · Exercise 54

Hypothesis testing: For the following 10 exercises, answer each question.

According to the New York Times Almanac the mean family size in the United States is 3.18. 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, is the class’s mean family size greater than the national average? Does the Almanac result remain valid? Why?

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

OpenStax, Statistics · §9.5 Additional Information and Full Hypothesis Test Examples · Exercise 54