For part C the choices are in the below photos a) Find a90% cofdence interval So

Question

For part C the choices are in the below photos
a) Find a90% cofdence interval Sor te success rate at tis dik The conidence interval is approximately (Roundto oe dense places as needed b) Inerpret your ienal in this coneet Choose the comect answer below OA. There is 90% corddence that he interval contains tho true proportion ofwomen under 40 who were hoped by this dik and gave bith OB. There is 90% oonfdence that the proportion of bits to women under the age of 40 whehad previooly been unable to co ceive is apgroin ately 23% OC. There is 90% d'aneth.the sameleproponian aflive births to wormen under the age of 40 who had previonly been unabletoconceive th inside he confidence mervak c) Explain what '90% confidence-means If repeated random samples of , were selected. itis e·pected that about 90% ofthe conferce itmals would contain the of women who had previously been unable to conceive who were helped by this dlinic d) De test date rehn, h" (hic's claim ata 25% success rate? Expen No because the value of 25% is wahin the cofdenco imerval Yea because he value of 25% is witin the cantdence interval Yes, because the value of 2S% is not within he oorSdence interval No because the van of 25% is not within the comfdence iterval O A. O C. O o.

Explanation / Answer

a) here p=45/200=0.225

std error =(p(1-p)/n)1/2 =0.0295

for 90% CI ; z=1.645

therefore 90% confidence interval =p -/+ z*std error =0.176 ; 0.274

b)

option A is correct

c)

random sample of the same size were selected. ..........contain the true proportion................

d)

option A is correct.

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