12.57 What social media tools do marketers commonly use? The Social Media Examiner surveyed 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 table at right. Data extracted from 2017 Social Media Marketing Industry Report, available at bit.ly/2rFml.zh Chapter Review Problems 453 BUSINESS FOCUS SOCIAL MEDIA TOOL Facebook B2B B2C 89% 97% 75% 65% 81% 44% 26% 32% Twitter LinkedIn Pinterest For each social media tool, at the 0.05 level of significance, deter mine whether there is a difference between B2B marketers and B2C marketers in the proportion who used each social media tool.