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

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4. In a 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 the percentage of women who saythat chocolate makes them happier. Insert a screenshot, write downthe confidence interval and write a brief statement interpretingthe result. 3 (d) Use Excel to test the claim that when asked, morethan 80% of women 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 resultfrom (c)? Explain

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a It is not mentioned that the women surveyed might not be selected randomly This might lead to a bias in the observation as it will not represent the true See Answer

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