We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
However, I will start you out.
Ha: µ < 30
Z = (score-mean)/SEm
SEm = SD/√n
A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.8 g with a standard deviation of 3.9 g At the 0.05 significance level test the claim that the sample comes from a population with a mean weight less tan 30g Assume that the weights are normally distributed. Choose an answer for each question
The alternative hypothesis is? A) µ ≠ 30.0 B) µ < 30.0 C) µ ≥30.0 D) µ< 28.8
The type of test is a) left tail b) right tail c) two tail
The test statistic for this hypothesis test is? -1.75 -1.52 -1.97 or -1.23
The critical value for the rejection region is -1.645 -1.753 -1.96 -1.697
2 answers
PsyDag sucks :/
1 answer