Is it non-directional or directional hypothesis? If asked...is there a difference of the quality of (x) from two treatment conditions.
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Is it non-directional or directional hypothesis? If asked...is there a difference of the quality of (x) from two treatment conditions.
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- A researcher is using a two-tailed hypothesis test with α = .05 to evaluate the effect of a treatment. If the boundaries for the critical region are t = ± 2.080, then how many individuals are in the sample?Why might a T-test be more useful in actual practice when you are running statistics rather than a Z-test? Give an example of a situation where you might use each of these and label their pros and cons.What is the df subject? What is the SS subject? What is F between?
- determine the following statement is a valid reason for using nonparametric methods? - We are reluctant to assume strong conditions on the data. (True or False)The difference between a quasi-experiment and a non experiment is on a continuum that depends on the extent to which researchers: A: manipulate the IV B: control for extraneous variables that could impact the DV so that groups/treatments are as equivalent as possible C: provide valid measures of the DV D: all of the aboveA researcher expects a treatment to increase the scores for individuals in a population. The treatment is evaluated using a one-tailed hypothesis test, and the test produces z = +2.40. Based on this result, which is the correct statistical decision
- If the value of Cronbach’s alpha is 0.07, it means ___________; a. Research instrument is not reliable b. Research instrument is internally consistent c. Data is reliable d. Data is internally consistentA researcher is testing a two-tailed null hypothesis at the p < .01 level with df = 48. What critical value would she or he use? Justify your answer.Dreamfilms Studios boasts that its summer features are so good that at least half of all tickets sold one summer are for its films. A competing studio claims that less than half of all tickets sold are for Dreamfilms' movies. After the hypothesis test is completed, the conclusion is to fail to reject the null hypothesis. If the true percentage of tickets sold for Dreamfilms Studios' movies that summer was only 48%, was an error committed? If so, what type?