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March 28, 2015

March 28, 2015

Posted by **Tyler** on Sunday, November 18, 2012 at 10:40pm.

a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to try to prove that more than half of all mobile phone users are now using the mo- bile Internet.

b. Based on your result in (a), is the claim implied by the authors valid?

c. Suppose the survey found that 53% of mobile phone users are now using the mobile Internet. Repeat parts (a) and (b).

d. Compare the results of (b) and (c).

- Stats PLEASE HELP!!! -
**MathGuru**, Monday, November 19, 2012 at 12:45pmYou can try a proportional one-sample z-test for this one since this problem is using proportions.

Null hypothesis:

p ≤ .50

Alternate hypothesis:

p > .50

Using a formula for a proportional one-sample z-test with your data included, we have:

z = .52 - .50 -->test value minus population value

divided by

√[(.50)(.50)/1132]

Finish the calculation. Determine the p-value using the z-score you calculate. (The p-value is the actual level of the test statistic.) Compare to the level of significance for a one-tailed test, which is 0.05. Determine whether or not to reject the null and conclude a difference (p > .50). For part c, redo the same process using .53 instead of .52.

(Hint: One null hypothesis will be rejected; one will not.)

I hope this will help get you started.

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