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1) Describe how power of hypothesis test is influenced by each of following. Suppose that all other factors are held constant.
a) Increasing the alpha from 0.01 to 0.05.
b) Changing from one-tailed test to two-tailed test.
2) Researcher is estimating influence of treatment using sample selected from normally distributed population with mean of m = 80 and standard deviation of s = 20. Researcher expected 12 point treatment effect and plans to use two tailed hypothesis test with = 0.05.
Calculate power of test if researcher uses a sample of n = 16 individuals.
Determine mean of distribution shown. Give the mean of following probability distribution?
Determine the variance of firm's profit for the month.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
Compute the optimal production quantities for the company?
Find the probability of a Type II error if in fact the mean waiting time is actually 9.8 minutes.
At a = 0.05, can you reject claim that at least 52% of adults are more probable to purchase a product when there are free samples?
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
LPP using the graphical method. Solveout the following linear programming problem utilizing the corner point method.
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
Is the hot-air balloon significantly shorter than light rail? How can you tell? What do you tell university officials?
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