Question: The researchers in a Pew study interviewed two random samples, one in 2015 and one in 2018. Both samples were asked, Have you read a

The researchers in a Pew study interviewed two random samples, one in 2015 and one in 2018. Both samples were asked, “Have you read a print book in the last year?” The results are shown in the table below.

Read a print book 2015 2018 Total Yes 1201 1341 2542 No

a. Find and compare the sample proportions that had read a print book for these two groups.

b. Find a pooled estimate of the sample proportion.

c. Has the proportion who read print books increased? Find the observed value of the test statistic to test the hypotheses H₀: p₂₀₁₅ = p₂₀₁₈ and Ha: p₂₀₁₅ 2018 assuming the conditions for a two-proportion z-test hold.

Read a print book 2015 2018 Total Yes 1201 1341 2542 No 705 661 1366 Total 1906 2002

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a The sample proportion of people who read a print book in 2018 is 12012542 0472 and in 2015 is 7051... View full answer

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