According to comScore, Apple’s smartphone operating system controlled 39% of the U.S. smartphone market in February 2013. Suppose Apple believes that this market share will increase due to recent advertising campaign. To test this hypothesis, a random sample of 275 smartphone users was selected, 126 of whom owned smartphones using Apple’s operating system. Using a = 0.05, answer the following.

a. State the null and alternative hypothesis.

b. Based on this sample, what conclusions can be drawn for this test?

c. Determine the p-value for this test and interpret its meaning.

d. Verify your results using PHStat.

AppendixLO1