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a. Using the table of critical values of t in Appendix A-2, find the critical value of t for an experiment in which there are 28 participants, using an alpha level of .05 for a one-tailed test
b. Find the critical value of t for an experiment in which there are 28 participants, using an alpha level of .01 for a one-tailed test.
Are there any statistically significant differences in baseline characteristics between treatment groups? Justify your answer. Write the hypotheses and the test statistic used to compare ages between groups. (No calculations - just H 0 , H 1 and for..
The average playing time of compact discs in a large collection is 35 min, and the standard deviation is 5 min. What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from ..
Using convolution, determine the pdf of a continuous random variable Z where Z = X + Y. Here, X has a uniform distribution on [0, 3] and Y is a constant of value 2. Assume that X and Y are independent.
Historically the average age of European soccer players is reported as 26 years with a standard deviation of 4 years. A random sample of 81 European professional soccer players has an average age of 27 years.
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.
if a couple were planning to have three children the sample space summarizing the gender outcomes would be bbb bbg bgb
For a sample of 36 students in a class the mean score in Mathematics is 72 with a standard deviation of 7. Find the 95% confidence interval for the mean score.
Consider the data set sunspots from Andrews and Herzberg (1985) as a response variable. For the predictor data x, use
Further, 20 students get both questions 1 and 2 incorrect, 15 get both questions 2 and 3 incorrect, and 8 get both questions 1 and 3 incorrect, and 7 get all three questions incorrect. Find the probability that a randomly selected student: a) Gets..
gallop a national polling organization surveyed 1018 randomly selectd american adults about their level of education
the average number of phone calls at a particular phone booth is 6 per hour. if someone arrives immediately ahead of
a study of fill volumes is conducted at a food canning factory to determine the level of consistency between the two
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