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Should you use a two tailed test versus the one tailed test? If the hypothesis is non-directional and you predict a difference between the means but do not specify which mean will be higher a two tailed test should be used.
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
Determine the area under the standard normal curve that lies: (a) to the left of Z = -2.31 (b) to the right of Z = -1.47 (c) between Z = -2.31 and Z = -1.47 (d) between Z = 1.47 and Z = 2.31
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
Find out the earliest completion time for play and critical path.
Compute the grouped data mean for this distribution. Use MINITAB and using the original scores, compute the raw-data mean. Use MINITAB.
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
If there is an outage, there is a .05 probability that the resulting losses will be very large, approximately $ 80 million in lost earnings. Also, it is estimated that there is a .95 probability of only slight losses of around $ 1 million. What is..
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
If X and Y are two independent Poisson random variables, then show that the conditional distribution of X given X+Y is binomial.
Discuss why sampling is essential to many research designs, and why, if done correctly may be more accurate than attempting census measurement.
What is a discrete random variable and how does it differ from a continuous random variable? Give examples.
Illustrate what decision should be made depended on the mini-max regret criterion. Decision based on the Mini-max criterion.
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