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If you want to be 95% confident of estimating the population mean to within a sampling error of (Plus or minus 6) and the standard deviation is assumed to be 18, what sample size is required?
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
A pharmaceutical company conducted study to evaluate the effectiveness and safety of new inhaled form of insulin for treatment of diabetes. A group of 650 diabetics was given the drug twice a day, while another group of 650 diabetics was given an ..
Tthe United States during 1993 was $40,500. Assume the standard deviation was $8,500. Should a mobile home selling for $75,000 be considered an outlier? Explain why or why not.
The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds.
a psychologist is investigating the hypothesis that children who grow up as the only child in the household develop
Complete the test at the 5% level of significance.
a researcher has reason to believe that for an experiment with 50 points a 95 prediction interval would be of width 8.
annual maximum wind speed gusts have been modeled as both a type i gumbel and type ii largest extreme value. if the
eight different medical students took blood pressure measurements of the same patient and the results are listed below.
are you annoyed with spam e-mail? suppose a random sample of 200 penn state students was asked this question of which
grindwell inc. a manufacturer of grinding tools is conshycerned about the durability of its products which dependson
Computing the probability values for the given discrete distribution - What is the probability that you did not shake hands with a person with the flu
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