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A researcher reports an f -ratio with df= 2, 27 from an independent-measures research study.
a. How many treatment conditions were compared in the study?
b. What was the total number of participants in the study?
If these three components are weighted at 35%, 45%, and 20%, respectively, what is the weighted mean for her course performance?
International Diversification Explain how the Asian crisis would have affected the returns to a U.S. firm investing in the Asian stock markets as a means of international diversification. (See the chapter appendix.)
Egyptians watch an average of 2.5 hours of television per person per day. If the standard deviation for the number of hours of television watched per day is 1.6 and a random sample of 225 Egyptians is selected, the mean of this sample belongs to a..
The following output comes from a 2x2 factorial ANOVA analysis done on a dataset of Apgar scores. Apgar scores are a method for quickly and reliably summarizing the health of a newborn infant (lower scores indicate worse health, higher scores indi..
On average the return time Y is greater than the delivery time X. Determine the mean and standard deviation of how much the return time Y exceeds the delivery time X.
Each judge is asked to state which glass he or she most enjoyed. Suppose that the two formulas are equally attractive. Let Y be the number of judges stating a preference for the new formula. Find the probability function for Y .
An experiment involves 17 participants. From these, a group of 5 participants is to be tested under a special condition. How many groups of 5 participants can be chosen, assuming that the order in which the participants are chosen is irrelevant?
describe the assumptions of normality and homogeneity of variance. when these assumptions are violated what are your
High School GPA is normally distributed with a mean of 3.06 and a standard deviation of 0.40. The probability of a randomly chosen student having a HS GPA between 3.54 and 3.80 is
QUALITY CONTROL The quality-control department of Starr Communications, the manufacturer of video-game cartridges, has determined from records that 1.5%.
Does the plot show a positive association, a negative association, or no association between the two variables? Explain.
In order to discover if higher SAT score, had an effect on a person's future earnings. Are these good variables and what type of statistical methods would I use to evaluate the hypotheses? Would I use a multiple regression?
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