In the survey sponsored by the Lindt chocolate company, 1708 women were surveyed and 85% of...

In the survey sponsored by the Lindt chocolate company, 1708 women were surveyed and 85% of them said that chocolate made them happier.
a) Is there anything potentially wrong with this survey?
b) Of the 1708 women surveyed, what is the number of them who said that chocolate made them happier?
c)Use Excel to construct a 98% confidence interval estimate of the percentage of women who say that chocolate makes them happier. Insert a screenshot, write down the confidence interval and write a brief statement interpreting the result.

(d) Use Excel to test the claim that when asked, more than 80% of women say that chocolate makes them happier. Use a 0.02 significance level. (i.e. complete steps (a) to (e) similar to question 3)
(e) Does your result from (d) contradict your result from (c)? Explain.

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milcah answered 1 month ago

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