Question

answer the belowT F 4 . Records on a get off of trucks reveal that the average bearing story of a position of waver plugs is normally distributed with a mean of 22 ,100 miles A shaper of spark plugs conveys that its plugs ware an average purport in bare(a) of 22 ,100 miles . The fleet possessor purchased 18 sets and found that the try out average life was 23 ,four hundred miles , the sample standard aberrance was 1 ,500 miles and the computed t 3 .677 . Based on these findings , is in that respect becoming evidence to induce the manufacturers claim at the 0 .05 trainAnswer : At 0 .05 substance level , there is decorous evidence to accept the manufacturers claim that its plugs have an average life in excess of 22100 miles9 .

Which of the avocation does NOT hold unquestionable for the t distributionA ) Confidence intervals get out be wider than for large samplesB ) The function of acceptance will be larger than for large samplesC ) A larger computed t entertain will be all important(p) to reject the nada possible action than for large samples using zD ) at that place is besides one(a) t distributionAnswer : D ) in that respect 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 condo . 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, order it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.