What social media tools do marketers commonly use? The "2012 Social Media Marketing Industry Report" by Social Media Examiner (socialmediaexaminer.com) surveyed the percentage of marketers who commonly use an indicated social media tool. Surveyed were both B2B marketers, marketers that focus primarily on attracting businesses, and B2C marketers, marketers that primarily target consumers. Suppose the survey was based on 500 B2B marketers and 500 B2C marketers and yielded the results in the following table. (Data extracted from bit.ly/ QmMxPa.)

For each social media tool, at the 0.05 level of significance, determine whether there is a difference between B2B marketers and B2C marketers at the 0.05 level of significance.

SOCIAL MEDIA TOOL Facebook Twitter LinkedIn YouTube or other video BUSINESS FOCUS B2B 87% 84% 87% 56% B20 96% 80% 59% 59%