Question

A recent study revealed the typically American coffee drinker consumers an average of 3.1 cups
per day. A sample of 12 senior citizens revealed they consumed the following amounts of coffee, reported in
cups, yesterday.
3.5, 3.3, 3.5, 2.6, 2.7, 4.3, 4.0, 3.8, 3.1, 4.1, 3.1, 3.0
At the 0.05 significance level, do these sample data suggest there is a difference between the national
average and the sample mean from senior citizens?

- State the hypothesis testing.

-What is the decision rule?

- Compute the value of the test statistics.

- Compute the p-value?

- What is your decision regarding H 0 ?
t.

Answer 1