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A researcher obtains t = 4.00 and MD = 9 for a repeated-measures study. If the researcher measures effect size using the percentage of variance accounted for, what value will be obtained for r2?
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
As the correlation coefficient increases from 0.85 to 0.88, do the points of the scatter plot move toward the regression line, or away from it?
(a) What is the relative frequency (i.e., proportion) of observations falling in the 0.260-0.280 interval? (Give your answer to four decimal places.) (b) What is the shape of the data distribution?
Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Here are data on the "penetrability" of the same type of soil at 2 levels of compression.
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
a) Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier. b) Compare your interval in (a) with your interval from Exercise 18.32. What is the most important effect of removing the ou..
Demonstrates clearly and fully the ability to use Excel to perform the correlation for the data set.
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
If probability of demand for 50 units is .40, probability of demand of 100 units is .50, and probability of demand for 150 units is .10, what lot size would you recommend if the goal is to maximize expected profit?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Determine the critical path probability that project will be completed within?
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies or counts of categorical responses between two (or more) independent grou..
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