Independent-measures research
The data from independent-measures research study produce a sample mean difference of 6 points and an estimated standard error of 2 points. If there are n = 8 scores in each sample, then the value for the t statistic is ____.
6/4
6/0.25
6/2
6/0.50
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Supposing the weights of individual bags are independent, determine the probability that 11 or fewer bags weigh less than 50 pounds in a sample of size 17? Provide your answer to four decimal places.
Joe goes to the library and finds 10 novels, 6 history books, and 7 biographies that he would like to read. How many different selections can he make if he selects one of each kind?
If a die is rolled one time, what is the probability of getting a number less than 5?
Compute a 95% confidence interval for the proportion of surgeries follrowed by surgical site infections in the U.K.? Assume that the data are a random sample.
The homogeneity of variance assumption states that the two population variances are equal.
For an independent-measures research study, the data show an 8-point difference between the two treatment means and a pooled variance of 4. Given this information, what is the value of Cohen's d?
For independent-measures t statistic, the estimated standard error measures how much difference is reasonable to expect between two sample means if the null hypothesis is true.
An independent-measures study produces sample means of M1 = 35 and M2 = 31 and a pooled variance of 25. For this study, Cohen's d = ____.
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