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Illustrate all the work and compute step by step
1. A researcher performs the independent -measures research study and obtains t =2.070 with df= 28.a. How many individuals participated in entire research study?b. Using two-tailed test with α = .05, is there significant difference between two treatment conditions?c. Calculate r2 to measure percentage of variance accounted for by treatment effect.
Can you explain to me how the null and alternative hypothesis for one-sample testing differs from two-sample testing; and explain how these two hypothesis' are the same. Please provide a numerical example:
Each salesperson at stiles compton is rated either below average, average, or above average with respect to sales ability. Each salesperson is also rated with respect to his or her potential for advancement.
What terms describe the fit of a regression equation to the data? What is the practical use of the regression equation in the real world? Explain with some examples.
A sample of 10 urgent and non-urgent patients was conducted to determine average wait time. The hospital wants to be sure that urgent patients do not wait as long as non-urgent patients. The following hypotheses have been formulated.
Drawing the standard normal curve and indicating the area representing the probability and
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
Plot fitted values against residuals. Does this plot point out any problems with homoscedasticity?
In the study of age and systolic blood pressure of five randomly selected subjects, a researcher reported the following data.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
Determine the lowest weight a student can have and still be qualified to enter the school.
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