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Suppose that the number of in cream cones eaten in a year by Americans is normally distributed and the mean number of ice cream cones Americans eat is 50 a year. Suppose that a researcher takes 1,000,000 samples of Americans, and each sample consists of 5 Americans. She asks each American how many ice cream cones they eat. She then calculates a mean for each of the 1,000,000 samples. If she added up the mean for each sample, and divided by 1,000,000, what would she get? Explain why.
Suppose we represent vectors v = (v i ) as sequences of numbers, and matrices m = (mij) as sequences of vectors (the rows of the matrix). For example, the matrix
H: μ = 50. A sample of 25 scores is selected and the mean is M = 55.Assuming that the sample variance is s2 = 100, compute the estimated standard error and the t statistic.
Scenario: Dole Pineapple, Inc., is concerned that the 16-ounce can of sliced pineapple is being overfilled. Assume the standard deviation of the process is .03 ounces.
suppose that the hypotheses h0p.35 and hapgt.35 are to be tested. calculate the ovserved z-statistic for the sample
In general how is the magnitude of the standard error of estimate related to the value of correlation?
peggy has drawn two cards from a standard dock and obtained an ace of clubs and a king of clubs. if peggy draws three
question a professor in the psychology department would like to determine whether there has been a significant change
What is the null hypothesis in a chi-squared test of independence? How many 'tails' can a chi-squared test have, one or two? In a regression analysis, what do the residuals from the fitted line add up to?
the amounts in ounces of juice in eight randomly selected juice bottles are15.2 15.7 15.9 15.9 15.1 15.5 15.7
if 70 percent of the population of a large community is in favor of a proposed rise in school taxes using the normal
Repeat part (a), but with an interaction term included. Interpreting the R2 value, to what extent has inclusion of the interaction term improved the model's explanatory power?
suppose 10 players are selected at random out of eighteen possible people where 15 are women and 3 are men with each
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