Example 8 - 1. State the Null and Alternative Hypotheses

1. The average age of first-year medical school students is less than 29 years.
2. The average number of seasons in which an NBA player participates is 4.71.
3. The average number of monthly sessions on the Internet by a person at home has increased from 36.
4. The average cost of a basic cell phone plan is at least $79.95.
5. The average weight loss for a sample for a sample of people who exercise 30 minutes per day for 6 weeks is 8.2 pounds.

Solution:

1. The average age of first-year medical school students has decreased from 29 years.

The researcher knows a previous value for the average age and believes that the age has decreased. Thus, no change would mean that the age is the same as it was before. The_________ hypothesis is that the average age is 29 years, H₀:

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