Confidence Interval Estimate - Social Media Example
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In a survey of 1200 social media users, 76% said okay to friend co-workers, but 56% said it is not okay to friend co-workers. (Data extracted from "Facebook Etiquette at work," USA Today, March 24, 2010, p.1B).
a. Construct a 95% confidence interval estimate for population proportion of social media users who would say it is okay to friend co-workers.
b. Construct a 95% confidence interval estimate for population proportion of social media users who would say it is not okay to friend co-workers.
c. Write a short summary of the information derive from (a) and (b)
Please answer in excel using functions.
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Solution Summary
The solution gives detailed steps on constructing a 95% confidence interval estimate for population proportion using excel.
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a. At 95% level, the critical value of z=1.96, so a 95% confidence interval estimate for population proportion of social media users who would say it is okay to friend co-workers = 0.76 +/- ...
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