k Michael Beale Google Chrome Do Secure https://www.mathd.com/Student/Playeromew

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k Michael Beale Google Chrome Do Secure https://www.mathd.com/Student/Playeromework.aspxhomeworkd 18f Stal 2 Spring 2018 Michael Beau i t/18 10 55 A Homework: HW 1 Normal Distrib, Sampling Distrib Ch 6.2 & Ch Sa Score: 0 2 of 1 pt HW Score: 58 64%, 4.107 7.3.15-T Questo, Help corsumers as socually cOmScIou cOnsumers Accondng to one ofl the researchers marketers need to know who these consumers are if they want to maximze the socal and busness etum of ther cane marketng eforts Suppose a sample of 100 consumers from the negion is selected Hposuble, usn the normal dtibuion to approximute the samping dstroution of he proportion Complete parts(aj theough i(g) below a. vhut is e priobsibity that in the sampke tewer than 20% are wling to spend exta for products and sevices from socially responsible comparies? The probabley "s so% oardtomodeonal places needed) The probabMy is 7454 Hound to bwo decival places as need Esor your arwer in the anwr bo and then cick Chack Arwr

Explanation / Answer

std error of proportion =(p*(1-p)/n)1/2 =0.0439

for z score=(X-mean)/std error

here a) P(X<0.26)=P(Z<(0.26-0.26)/0.0439)=P(Z<0)=0.5 ~ 50%

b)P(0.21<X<0.31)=P(-1.1399<Z<1.1399)=0.8728-0.1271 =0.7457 ~74.57%

c)P(X>0.21)= P(Z>-1.1399)=0.8728 ~ 87.28%

please revert

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