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If the last digit of a weight measurement is equally likely to be any of the digits 0 through 9. Round your answers to one decimal place (e.g. 98.7).
a) What is the probability that the last digit is 0?
b) What is the probability that the last digit is greater than or equal to 5?
If a survey of 100 randomly selected united states residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
The standard deviation of the population weight losses is about 10 pounds. How large a sample should he take to estimate the mean weight loss to within 2 pounds, with 95% confidence?
A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.
the mean weight of luggage check by a randomly selected tourist-class passenger flying between two cities on a certain
six students three boys and three girls lineup in a random order for a photograph. what is the probability that the
If they stop 40 cars during the first hour, what is the mean of the number of drivers expected to be wearing their seat belts?
The data are reported in thousands of dollars. The following data represent a ransom sample from the study. Compute the sample correlation coefficient r. Give a brief explanation of the meaning of this value.
The probability that a person suffering from a migraine headache will obtain relief from a particular drug is 0.9. Three randomly selected sufferers from migraine headache are given the drug. Find the probability that the number obtaining relief w..
suppose that a random variable x has the uniform distribution on the interval 01. determine the p.d.f. of a x2 b -x3
if a researcher wants to be 95 percent confident about the results of a study and past studies of the same attitude
Find out whether or not right-hemisphere damage results in significantly reduced performance on spatial skills task. Test with alpha set at .05 with one tail.
A random sample of 20 patients in a weight loss clinical trial lost an average of 25 pounds over an 8 week period. The sample standard deviation is 10.
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