The accompanying data shows tre weekly purchases of printers at a particular ele

Question

The accompanying data shows tre weekly purchases of printers at a particular electronic store Using a -0.05, perform a chi-square test to determine if the number of printers sold per week follows a normal probablity diestrbution Note that x-11.4 ands 4.5 ckkee icon to view the weekly purchases of printers State the appropriate null and alternative hypotheses What is the null hypothesis? O A. H The number of printers sold per week at the electronic store ollows the normal probablity dstibution B. HD The mean number of weekly preters purchased is 114 oc·My The number of printers sold per week at the electrone store does not folow te nor nal probabley dste ton O D. Mo The mean number of weekly printers purchased is not 11.4 What is the alternative hypothesis? O A A. H The number of peinters sold per week at the electronic store follows the normal probability distribuion O B. H,: The mean number of weekly printers purchased is not 11. c, n, The mean number of weekly prters purchased s 114 D. H, The number of prrters sold per wook at the electronic store does not follow the normal probability dastribution use the inervals below to cakuáste he ch-sqare tost stassic. normal probability distrbution z s -10 nterval 1: Interval 2 -10z s0 Interval 3 Interval 4 10

Explanation / Answer

given x^=11.4

s=4.5

a =0.05

null hypthosis

option a  Ho : The number of printers sold per week at the electronic store follows the normal probability distribution

alternate hypothesis

option d H1 : The number of printers sold per week at the electronic store doesnot follows the normal probability distribution

chisquare test

x2 = tot (O — E)2/ E

x2 =5.28

pvalue is 2.478

do not reject h0 as there is no sufficent evidence

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