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.

a. Conduct a hypothesis test to determine whether the proportion of adults using social networking sites is equal for all four countries. What is the p-value? Using a .05 level of significance, what is your conclusion?
b. What are the sample proportions for each of the four countries? Which country has the largest proportion of adults using social networking sites?
c. Using a .05 level of significance, conduct multiple pairwise comparison tests among the four countries. What is yourconclusion?

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Countir Use Social Networking Sites Yes No Great Britain 344 456 Israel 265 235 Russia 301 399 United States 500 500