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A drugstore manager needs to purchase

A drugstore manager needs to purchase adequate supplies of various brands of toothpaste to meet the ongoing demands of its customers. In particular, the company is interested in estimating the proportion of its customers who favor the the country’s leading toothpaste Crest. File P08_15.xlsx contains the toothpaste brand preferences of 200 randomly selected customers, obtained recently through a customer survey. Find a 95% confidence interval using Excel for the proportion of all of the company’s customers who prefer Crest toothpaste. How might the manager use this confidence interval for purchasing decisions?Customer123456789101112131415161718192021222324252627282930313233343536373839404142 PreferenceColgateMentadentCrestColgateAquafreshOthersOthersAquafreshCrestOthersCrestCrestColgateColgateOthersColgateCrestColgateOthersColgateOthersAquafreshCrestCrestMentadentOthersCrestMentadentOthersColgateOthersCrestMentadentOthersCrestOthersOthersOthersCrestMentadentCrestColgate Thisisis fictitiousfictitiousdata.data.This 43444546474849505152535455565758596061626364656667686970717273747576777879808182838485 AquafreshCrestOthersOthersMentadentOthersMentadentCrestOthersOthersCrestOthersCrestCrestMentadentOthersColgateMentadentCrestMentadentOthersColgateCrestCrestColgateOthersColgateCrestMentadentCrestColgateColgateCrestCrestCrestAquafreshAquafreshCrestColgateCrestOthersColgateCrest 8687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128 OthersCrestOthersCrestCrestMentadentMentadentOthersOthersColgateCrestCrestOthersColgateMentadentOthersAquafreshColgateOthersMentadentCrestMentadentColgateColgateAquafreshCrestCrestAquafreshCrestOthersAquafreshOthersAquafreshOthersCrestCrestCrestColgateOthersOthersAquafreshOthersColgate 129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171 CrestMentadentOthersOthersCrestOthersAquafreshOthersOthersCrestMentadentOthersCrestAquafreshCrestMentadentMentadentCrestOthersOthersOthersCrestColgateAquafreshCrestOthersMentadentCrestOthersCrestMentadentCrestCrestOthersCrestOthersMentadentColgateOthersOthersOthersOthersCrest 172173174175176177178179180181182183184185186187188189190191192193194195196197198199200 OthersMentadentColgateCrestOthersMentadentOthersOthersMentadentCrestMentadentCrestColgateColgateAquafreshCrestOthersOthersOthersOthersColgateCrestAquafreshAquafreshOthersColgateOthersOthersCrest PreferenceAquafreshColgateCrestMentadentOthers Count1831602764 PreferenceAquafreshColgateCrestMentadentOthers Proportion0.090.1550.30.1350.32

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