in a study of 256,844 cell phone, it was found that 63 developed cancer Priscia
ID: 3264524 • Letter: I
Question
in a study of 256,844 cell phone, it was found that 63 developed cancer Priscia Btencourt 7/21/17 722 PM Homework: Homework 6-6 Score: 0 of 1 pt 6.7.20 4of6(2complete) HW Score: 16 67% 1 of 6 pts In a sluty of 256,844 cell phone users, it was tound thet 63 developed cancer of the brain or nervous systom Assuming that cell phones have no effect, there is a 0000314 probablity of a person developing cancer of the brain or nervousaWe theretore expect about 81 cases of such cancer in a group olf 256,844 people Estmale the probability of 63 or lewer cases of such cancer in a group of 256,844 people Whaitl do these sesults suggest about media reports that cell phones cause cancer of the brain or nervous systen pex s 63j:Rudtobur decni places as needed ) pex stin-(Round to tur don" places as needed ) Enter your answer in the answer box and then click Check Answer Clear AllExplanation / Answer
here mean =np=256844*0.000314=80.649
std deviaiton =(np(1-p))1/2 =8.979
therefore probability =P(X<=63)=P(Z<(63.5-80.649)/8.979)=P(Z<-1.9099)=0.0281
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