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A researcher is estmating influence of treatment using sample selected from normally distributed population with mean of µ = 80 and standard deviation of σ = 20. Researcher expects 12 point treatment effect and plans to use two-tailed hypothesis test with u α = .05
a. Calculate the power of test if researcher uses a sample of n = 16 individuals.b. Calculate power of test if researcher uses sample of n = 25 individuals.
Describe a scenario related to the final project in which you would use repeated-measures ANOVA. Describe a scenario related to the final project in which you would use MANOVA.
Determine whether the Zero Population Growth data for urban U.S. resident is also true for rural U.S. residents on the basis of the sample data with α=0.05.
A sample of 160 workers in the downtown area classified each worker by race. A bar graph of the results is given below, but the bar for black workers in the graph below has been omitted.
After treatment is administered to individuals in sample, sample mean is found to be M = 55. Determine Cohen's d measure effect size for both tests (σ = 20 and σ = 10).
At α = 0.10 test the claim that there is a difference in means of the salaries. (a) State the Hypotheses: (b) Compute the Test statistic: (Round off correctly)
The standard deviations s1 and s2 can be used when Ó1 and Ó2 are unknown and you believe that the underlying distribution is normal. Then, you would use s1 and s2 with the t-test for hypothesis testing.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Find the average cost of a loaf of bread in your area and compute the cost per day for one year. (Remember that average is the mean, median, mode, and midrange, but choose the best for the data.) 1. What measures of central tendency did you use?
For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
Suppose a fast food restaurant wishes to estimate average sales volume for a new menu item. The restaurant has analyzed the sales of the item at a similar outlet and observed the following results:
Formulate a linear programming model that can be used to determine the number of units each model that should be produced in order to maximize the total contribution to profit
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
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