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1. We thought that both populations we're interested in had the same proportion for some characteristic of interest. A pair of samples each of size 100 yield proportions of 0.22 and 0.31. Now...

Show that each estimator described below is unbiased and approximately normally distributed with standard error as given in the table of the text. Assume you have chosen independent samples.(a) The...

A legal challenge was brought against an employer alleging that a job promotion test was racially biased. Of 48 blacks who took the test, only 26 passed, whereas of 259 whites, 206 passed...

(a) Do you think the little kid would be likely to say, “Well … with a p-value of seven percent, even if the coin is biased, it doesn't seem to be VERY biased!”? (b) If the...

Our soft drink dispensing machine has a fill variance of 0.0324 ounces. Resetting the machine does not appreciably change the variance. After resetting the machine, it is now supposed to dispense...

Over the past year there have been 12 cancers of a certain type in the southern part of your city. The expected number of such cancers in a population of that size is 8.4. Could this difference be...