Social media is popular around the world. Statista provides estimate of the number of social media users in various countries in as well as the projections for . Assume that the results for surveys in the United Kingdom, China, Russia, and the United States are as follows. Country
Use Social United United
Media Kingdom China Russia States
Yes 480 215 343 640
No 320 285 357 360
Conduct a hypothesis test to determine whether the proportion of adults using social media is equal for all four countries. Using a 0.05 level of significance.
1. H0 : P1 is not equal to P2 = P3 = P4
2. H0 : P1 = P2 = P3 = P4
3. H0 : P1 is not equal to P2 = P3 is not equal to P4
A. What is the p-value? What is your conclusion?
B. What are the sample proportions for each of the four countries?
United Kingdom 0.60
China 0.43
Russia 0.49
United States 0.64
Which country has the largest proportion of adults using social networking sites?
C. Using a 0.05 level of significance, conduct multiple pairwise comparison tests among the four countries.