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The proportion of 200 children age 19-35 months from families in poverty who had inadequate polio vaccinations was found to be .21 in community A. Community B, which has a special program in place to increase vaccination of children from families in poverty, measured their vaccination proportion and found it to be. 12 among 150 children. Test the null hypothesis of equal proportions in the two communities using a = .05.
Also compute a 95% confidence limit for the difference in the two proportions. Contrast what statements can be made from the test and the confidence limits.
At the 0.10 significance level, can we conclude that the annual rates of return are higher on the big board?
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the number of cases of tetanus reported in the u.s. during a single month in 1989 has a poisson distribution with a
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You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.
We select a random sample of 25 observations from a normally distributed population with an unknown population variance. The computed test statistic for a right tail, greater than, hypothesis test is t=1.55.
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