What social media tools do marketers commonly use? The "2015 Social Media Marketing Industry Report" by Social Media Examiner (socialmediaexaminer.com) surveyed marketers who commonly use an indicated social media tool. Surveyed marketers who commonly use an indicated social media tool. Surveyed were both B2B marketers, marketers that primarily target consumers. Suppose the survey was based on 500B2B marketers and 500 B2C marketers and yielded the results in the following table below:

SOCIAL MEDIA TOOL	BUSINESS FOCUS (B2B) (%)	BUSINESS FOCUS (B2C) (%)
FACEBOOK	88	96
TWITTER	83	77

1. For each social media tool, at the 0.05 level of significance, determine whether there is a difference between B2B marketers and B2C marketers in the proportion who used each social media tool.
2. State the complete hypotheses (hypothesis null and hypothesis alternative for question (a) above