A test involving three brands of 3D monitors was conducted to compare average useful life for the three brands. Ten monitors of each brand were tested, with the following results:
Test the hypothesis that the average useful life for the populations represented here is the same for all three brands. Use a significance level of 5%.
Answer to relevant QuestionsThe commercial fishing industry is concerned about the effect on fish of small amounts of pharmaceuticals in rivers and coastal waters where extensive fishing is done. In a recent study of the effects of the drug oxazepam ...Western Metal Products is testing two new air filtration systems designed to reduce the fine particulate matter (PM2.5) that its furnaces release into the atmosphere through a large smokestack. Air samples were taken at five ...Use a statistical calculator or Excel’s F.DIST.RT function to determine the proportion of values in an F distribution that are greater than a. 3.762, if numerator degrees of freedom = 2 and denominator degrees of freedom ...In a test to compare the average LSAT (Law School Admission Test) scores for students who took one of three different prep courses for the exam, three samples of 21 students each were randomly selected to represent the three ...A random sample of size 20 from normal population A has a variance of 2000. A second (independent) random sample of size 10 from normal population B has a variance of 2500. Test a null hypothesis that the variances of the ...
Post your question