Pew Research conducts polls on social media use. In 2012, 66% of those surveyed reported using Facebook.
Question:
Pew Research conducts polls on social media use. In 2012, 66% of those surveyed reported using Facebook. In 2018, 76% reported using Facebook.
a. Assume that both polls used samples of 100 people. Do a test to see whether the proportion of people who reported using Facebook was significantly different in 2012 and 2018 using a 0.01 significance level.
b. Repeat the problem, now assuming the sample sizes were both 1500. (The actual survey size in 2018 was 1785.)
c. Comment on the effect of different sample sizes on the p-value and on the conclusion.
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Step by Step Answer:
a To test whether the proportion of people who reported using Facebook was significantly different in 2012 and 2018 we can use a twosample ztest for p...View the full answer
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Related Book For 
Introductory Statistics Exploring The World Through Data
ISBN: 9780135163146
3rd Edition
Authors: Robert Gould, Rebecca Wong, Colleen N. Ryan
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