To help consumers assess the reks they ane taking, the Food and Drug Administrat

Question

To help consumers assess the reks they ane taking, the Food and Drug AdministrationFDA) publiches the amount of nctine tound in all commencal brands of dparees. A new ogarete huen recendy mean nicotine coment of 25. 1 magrams and standard deviton ot 2 4 ans asaroo ofn-9agarde. The nat he meanone you agree? OA. OB. Yes, unce the value 288does not tante 99% cotdence mena Yes, since the value 28 8 des nhe 90% ond no OD. No, since the value 28 8 does not tinhe 99% contence Click to select your a Type here to search DOLL ab

Explanation / Answer

here std error =std deviation/(n)1/2 =2.4/(9)1/2 =0.8

for 99% CI ; and (n-1=8) degree of freedom criitical value t=3.3554

hence confidence interval =sample mean -/+ t*std error =22.4157 ; 27.7843

from above option D is correct

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