According to Pew Research Center surveys, 12% of American adults did not own a cell phone in 2012. Suppose Verizon Wireless would like to test if this percentage has recently changed. A recent random sample of 280 American adults was selected, and it was found that 29 of them did not own a cell phone. Using σ = 0.10, answer the following:
a. State the null and alternative hypothesis.
b. Based on this sample, what conclusions can Verizon Wireless make about this population?
c. Determine the p value for this test and interpret its meaning.
d. Verify your results using PHStat.