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9. A paper reported that in a representative sample of 299 American teens age 16 to...

9.

A paper reported that in a representative sample of 299 American teens age 16 to 17, there were 78 who indicated that they had sent a text message while driving. For purposes of this exercise, assume that this sample is a random sample of 16- to 17-year-old Americans. Do these data provide convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving? Test the appropriate hypotheses using a significance level of 0.01. (Round your test statistic to two decimal places and your P-value to four decimal places.)

z =
P-value =



State your conclusion.

Do not reject H0. We have convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving.

Reject H0. We do not have convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving.    

Reject H0. We have convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving.

Do not reject H0. We do not have convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving.



You may need to use the appropriate table in Appendix A to answer this question.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

The statistical software output for this problem is:

From above output:

z = 0.43

P = 0.3321

Conclusion: Do not reject H0. We do not have convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving.

Option D is correct.

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