h ework: U2 HW 8: Section 12.2 (Hypothesis Test for 1 Popul Score: 0 of 1 pt 70,

Question

h ework: U2 HW 8: Section 12.2 (Hypothesis Test for 1 Popul Score: 0 of 1 pt 70, 8 (1 complete) Score: 0%, oota 12.2.85-P aeston Hep According to a survey of 550 Web users from Generation Y, 206 reported using the Intenet to download music a. Detarmine the sample proportion. b.Atthe 1 % significance level do the data provide suncient evidence to conclude that ma ety of Generation Y test, ater checking the conditions for the procedure Web users were-t nel to dawnload manic? Use the one proportion 2-dest to perform the appropriate hypoths one a. The sample proportion is (Type an nteger or a decimal ,

Explanation / Answer

a) sample proportion phat =286/550=0.52

b) for null hypothesis:Ho: p=0.5

alternate hypothesis: Ha: p>0.5

at 1% level criitcal value Z =2.326

decision rule: reject Ho: if  Zcalc >2.326

n=550

std error =(p(1-p)/n)1/2 =0.0213

hence test stat zcalc =(phat-p)/std error =(0.52-0.50)/0.0213=0.9381

as test stat is less then critical value we fail to reject null hypothesis; there is not sufficient evidence to conclude that a majority of generation Y web user use the internet to download music

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