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.
p̂ =
(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.
Get Answers For Free
Most questions answered within 1 hours.