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A sample of n=9 scores has a mean of M=20. One of the scores is changed and the new mean is found to be M=22. If the changed score was originally X=7, what is its new value?
sampling distributions the following data represent the running lengths in minutes of the winners of the academy award
Show the histograms and calculate their means and variances and comment on your findings.
Take any number, square it, and add 6, multiply by the original number. Now add 5 to that. Now divide this by the original number plus 1. Now subtract your original number and you should get 5.
in a study of the effectiveness of a fabric device that acts like a support stocking for a weak or damaged heart 110
68 of these drivers were wearing seat belts. We wish to find if these data give good reason to conclude that more than half of Hispanic female drivers in Boston wear seat belts.
How many different sets of exactly 20 of the 23 people with reservations for coach seats are possible? (do you use permutations or combinations?)
Suppose that a random requisition is found to have been incorrectly entered. What is the probability that it was processed by data entry specialist 3?
determine the most conservative critical value for a one sided smith-satterthwaite test at alpha0.05 given var14 n14
Use simple exponential smoothing with α = 0.33 to forecast battery sales for February through May. Assume that the forecast for January was for 22 set of tires.
Random sample of 40 male math professors are selected. What is the probability that the sample mean salary of male math professors will not exceed that of the female math professors?
Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced.
random sample
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