Question

answer the belowT F 4 . Records on a be given of trucks reveal that the average lifetime story of a redress of waver plugs is normally distributed with a mean of 22 ,100 miles A shaper of spark plugs claims that its plugs have an average life in bare(a) of 22 ,100 miles . The fleet owner purchased 18 sets and found that the sapidness average life was 23 ,400 miles , the sample standard optical aberration was 1 ,500 miles and the computed t 3 .677 . Based on these findings , is at that place becoming evidence to accept the manufacturers claim at the 0 .05 trainAnswer : At 0 .05 significance level , there is lavish evidence to accept the manufacturers claim that its plugs have an average life in excess of 22100 miles9 .

Which of the following does NOT hold unquestionable for the t distributionA ) Confidence intervals will be wider than for large samplesB ) The split of acceptance will be larger than for large samplesC ) A larger computed t value will be intrinsic to reject the nada hypothesis than for large samples using zD ) at that place is besides one t distributionAnswer : D ) there is only one t distribution10 . Test at the 0 .01 level the statement that 55 of those families who plan to purchase a holiday residence in Florida destiny a condominium . The null hypothesis is 0 .55 and the alternate is ? 0 .55 . A stochastic sample of 400 families who planned to buy a vacation...If you want to get a full essay, orde r it on our website: OrderCustomPaper.com

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