In the survey sponsored by the Lindt chocolate company, 1708women were surveyed and 85% of them said that chocolate made themhappier.
a) Is there anything potentially wrong with this survey?
b) Of the 1708 women surveyed, what is the number of them who saidthat chocolate made them happier?
c)Use Excel to construct a 98% confidence interval estimate of thepercentage of women who say that chocolate makes them happier.Insert a screenshot, write down the confidence interval and write abrief statement interpreting the result.
(d) Use Excel to test the claim that when asked, more than 80% ofwomen say that chocolate makes them happier. Use a 0.02significance level. (i.e. complete steps (a) to (e) similar toquestion 3)
(e) Does your result from (d) contradict your result from (c)?Explain.
