Question

(d) What is the probability that between 60 and 80 customers will take the free sample and buy the prodact? Hint: Use the probability of waccm calkuated in part (, Need Help? in the following problem, check that t s appropriate to use the nomal approxdimation to the binomiad. Then use Ove n bution to estimate the requested probablaines What's your tavorite ice cream favor? For people who buy ice cream, the a time customers go to a grocery store in Cheyenne, Wyoming. t cream, the a8-tme tavorite is sta vanaa. About day to buy ice cream. (Round your answers to four decimal places.) 1% of ice cream sies are vala. Oocolate account for criv 9% of ice crean sas a..nla. sappoue that 364 a) What is the probablity that 50 or more will buy vanila? b) What is the probability that 12 or more will buy chocolate? buyru ce cream-a buy decolate or wst-non decolate and want (c) A customer who buys ice cream is not hsted to one contaner or one flavor what s the pebeaty t t someone-to flavor are not mutually exclusive events. Assume that the choice to buy one flavor is independent of the choice to buy another aver. Then use the mutiplicabion nule for independent events, together with th addition rule for events that are not mutualy exclusive, to compute the requested probability What is the probablaty that between 50 and 60 customers will buy chocolate or vanilla ice cream? ine: Use the probablaity of success computed in part (e). Tr Need Help? 6 020 Suppose we have 큐 bremial experiment in wtch success is defined to be a particular qualty or attbute that "terests at O Type here to search

Answer 1

Here Therefore , use novnop "f' oxi,"Sim 1.3G Plz> = 0-1989] tom statistic +bble b) Here , np 16.5% >to KeqL Vnpg 1636メ0-91 b. 555

By us The refore , , in depen dent snce, A&B are mubu us ant to find the P (50く<<60) Therefore р/.so-lgq*. 0,3 x-np.60- ey o.3 npg こ. 1+0.20 32-0.22.96 0,9936