Social networking is becoming more and more popular around the world. Pew Research Center used a survey of adults in several countries to determine the percentage of adults who use social networking...

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Extracted text: Social networking is becoming more and more popular around the world. Pew Research Center used a survey of adults in several countries to determine the percentage of adults who use social networking sites (USA Today, February 8, 2012). Assume that the results for surveys in Great Britain, Israel, Russia and United States are as follows. Country Use Social Great United Networking sites Britain Israel Russia States Yes 344 265 301 500 No 456 235 399 500 a. Conduct a hypothesis test to determine whether the proportion of adults using social networking sites equal for all four countries. Using a .05 level of significance. Use Table 12.4. 1. H, P, +P; - P, - P, 2. H, P -P; - P, = P. 3. H, P, + P; - P, +P. Choose correct answer from above choice 2 Hạ: Not all population proportions are equal The p-value is less than .01 what is your conclusion? Conclude the population proportions are not all equal. b. What are the sample proportions for each of the four countries? Round your answers to two decimal places. Great Britain 0.43 Israel 0.53 Russia 0,43 United States 0.50 Which country has the largest proportion of adults using social networking sites? Israel c. Using a .05 level of significance, conduct multiple pairwise comparison tests among the four countries. Round Pi Pjand Diff to two decimal places. Round CV ij to four decimal places. Comparison Pi Diff n 2 CV ij Diff > CV i Pi GB vs I 0.43 0.53 O -0.10 800 500 0.0793 Yes GB vs R 0.43 0.43 0.00 800 700 0.716 No GB vs USA 0.43 0.5 -0.07 80 1000 0.0659 Yes I vs R 0.53 0.43 0.10 500 700 0.0814 Yes I vs USA 0.53 0.5 0.03 500 1000 0.0765 No R vs USA 0.43 0.5 -0.07 700 1000 0.0685 Yes O 9 9 9 9 9 9 9 9 9 9 9 9 9 9 O 9 O 9 9 9 99 9 9 9 © © © © ®