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A random sample of medical files is used to estimate the proportion p of all people who have blood type B.
(a) If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 80% sure that the point estimate phatitalic will be within a distance of 0.052 from p?
(b) Answer part (a) if you use the preliminary estimate that about 9 out of 90 people have blood type B.
the data show the bug chirps per minute at different temperatures. find the regression equation letting the first
the desired percentage of sio2nbspin a certain type of aluminous cement is 5.5. to test whether the true average
He is sorry but there is a 99.9% (1-0.001) chance that you have HIV. Is he correct? What is the actual probability that you are HIV positive?
The data obtained are shown in the Excel worksheet Problem 4 and below. You are to test to determine if the type of ticket and the type of flight are independent or not. Use alpha = .05
Continuous random variable is uniformly distributed between a and b. The probability density function between a and b is.
Use both of these facilities regularly. Given that a randomly selected member uses the tennis courts regularly, find the probability that they also use the golf course regularly.
A poll of U.S. health professionals revealed 82% would choose the same career. In a hypothesis test conducted at a level of significance of 5%, a P-value of 0.023 was obtained.
In 36 randomly selected seawater samples, the mean sodium chloride concentration was 23 cubic centimeters per cubic meter and the standard deviation was 6.7 cubic centimeters per cubic meter (cc/cm).
the monthly incomes for 12 randomly selected people each with a bachelors degree in economics are shown on the
Test the hypothesis that the annual income of corporate trainers in areas of more then 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.
the probability of an american adult flying a kite at least once in the year 2003 was 0.023. the probability of
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