Question

# Teenage Tobacco Use: In a random sample of 900 teenagers, 168 had used tobacco of some...

Teenage Tobacco Use: In a random sample of 900 teenagers, 168 had used tobacco of some form in the last year. The managers of an anti-tobacco campaign want to claim that less than 20% of all teenagers use tobacco. Test their claim at the 0.10 significance level.

(a) What is the sample proportion of teenagers who use tobacco? Round your answer to 3 decimal places.
=

(b) What is the test statistic? Round your answer to 2 decimal places.
z =

(c) What is the P-value of the test statistic? Round your answer to 4 decimal places.
P-value =

(d) What is the conclusion regarding the null hypothesis?

reject H0

fail to reject H0

(e) Choose the appropriate concluding statement.

The data supports the claim that less than 20% of all teenagers use tobacco.

There is not enough data to support the claim that less than 20% of all teenagers use tobacco.

We reject the claim that less than 20% of all teenagers use tobacco.

We have proven that less than 20% of all teenagers use tobacco.

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