More people are using social media to network, rather than phone calls or e-mails (US News & World Report, October 20, 2010). From an employment perspective, jobseekers are no longer calling up friends for help with job placement, as they can now get help online. In a recent survey of 150 jobseekers, 67 said they used LinkedIn to search for jobs. A similar survey of 140 jobseekers, conducted three years ago, had found that 58 jobseekers had used LinkedIn for their job search. UseTable 1.

Letp₁represent the population proportion of recent jobseekers andp₂the population proportion of job seekers three years ago. Let recent survey and earlier survey represent population 1 and population 2, respectively.

a.Set up the hypotheses to test whether there is sufficient evidence to suggest that more people are now using LinkedIn to search for jobs as compared to three years ago.

a. H₀:p₁p₂= 0;H_A:p₁p₂ 0

b. H₀:p₁p₂ 0;H_A:p₁p₂> 0

c. H₀:p₁p₂ 0;H_A:p₁p₂< 0

b.Calculate the value of the test statistic.(Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)

c.Calculate the critical value at the5% level of significance.(Round your answer to 3 decimal places.)

d.Interpret the results.

a. RejectH₀; there is an increase in the proportion of people using LinkedIn

b. RejectH₀; there is no increase in the proportion of people using LinkedIn

c. Do not rejectH₀; there is an increase in the proportion of people using LinkedIn

d. Do not rejectH₀; there is no increase in the proportion of people using LinkedIn