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Two balls, each equally likely to be colored either red or blue, are put in an urn. At each stage one of the balls is randomly chosen, its color is noted, and it is then returned to the urn. If the first two balls chosen are colored red, what is the probability that
(a) both balls in the urn are colored red;
(b) the next ball chosen will be red?
patients who have artificial hip-replacement surgery experience pain the first day after surgery. typically the pain is
suppose you wish to test the claim that micro lt 28.3. given a sample of n 86 and a significance of 0.05 what
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
the characteristic function of the cauchy distribution is e-t determine the characteristic function of x1n?xi i1....n
State the hypotheses. State the decision rule & sketch it. Find the sample proportions & z test statistic.
describe and explain two alternatives to nhst. what do their proponents consider to be their
in a particular city the average salary of secretaries is 30000 per year. secretaries at company a claim that they are
Obtain the analysis of variance table that decomposes the regression sum of squares onto extra sums of squares associated with X1 and with X2, given X1.
assume that a simple random sample has been selected from a normally distribution population and test the given claim.
Normal distribution with mean 35 minutes and standard deviation 2 minutes. On 95% of occasions the mailing preparation takes less than _______ minutes.
sampling plan for a movie promotion. advertising companies often try to characterize the average user of a clients
an analyst is testing a two tail hypothesis to determine if the mean housing loan has changed from last years value of
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