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A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12 point treatment effect and plans to use a two-tailed hypothesis test with u α = .05
a. Compute the power of the test if the researcher uses a sample of n = 16 individuals.
b. Compute the power of the test if the researcher uses a sample of n = 25 individuals.
When we move from the basic normal distribution to the sampling distribution of the mean we substitute the standard error of the mean for the standard deviation when we make the conversion to the standardized normal distribution.
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
If standard deviation is 50 hours and α is equal to 0.01, what values for mean x will result in rejection of null hypothesis.
would you favor or oppose providing a path to citizenship for illegal immigrants in the U.S if they met certain requirement including a waiting period, paying fines and back taxes, passing criminal background checks and learning English? What is the ..
What is the appropriate set of hypotheses to test such that a possible outcome of the test would indicate;
Compute the mean, variance and standard deviation for the grouped data. Based on the previous answer, how much could the realtor expect to make if he sells 3 houses?
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Give an understanding with the difference between a population, a sample, and a sampling distribution. Uus a Java applet and external web sites for comment/reference.
A personality psychologist conducts a study to examine the relationship between extraversion and the number of siblings in a household.
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
Constructing histogram, Using a normal probability plot, Plotting residuals versus x values.
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