Use of Social Media. Social media is becoming more and more popular around the world. Statista.com provides estimates of the number of social media users in various countries. Assume that the results for surveys in the United Kingdom, China, Russia, and the United States are as follows.

a. Conduct a hypothesis test to determine whether the proportion of adults using social media is equal for all four countries. What is the p-value? Using a 0.05 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 media?

age content Use Social Media Yes No United Kingdom 480 320 Country China Russia 215 343 285 357 United States 640 360