4.22 How will marketers change their social media use in the near future? A survey by Social Media Examiner reported that 76% of B2B marketers (marketers that focus primarily on attracting businesses) plan to increase their use of LinkedIn, as compared to 55% of B2C marketers (marketers that primarily target consumers). The survey was based on 1,945 B2B marketers and 1,868 B2C marketers. The following table summarizes the results:
INCREASE USE OF LINKEDIN?
BUSINESS FOCUS
B2B B2C Total
Yes 1,478 1,027 2,505
No 467 841 1,308
Total 1,945 1,868 3,813
Source: Data extracted from "2012 Social Media Marketing Industry Report," April 2012, p. 27, bit.ly/HaWwDu.
a. Suppose you know that the marketer is a B2B marketer. What is the probability that he or she plans to increase use of LinkedIn?
b. Suppose you know that the marketer is a B2C marketer. What is the probability that he or she plans to increase use of LinkedIn?
c. Are the two events, increase use of LinkedIn and business focus, independent? Explain.
