The lumen output was determined for each of I = 3 different brands of lightbulbs having the same wattage, with J = 9 bulbs of each brand tested. The sums of squares were computed as SSE = 4778.7 and SSTr = 599.8. State the hypotheses of interest (including word definitions of parameters). μi = sample average lumen output for brand i bulbs

What is the value of x in the following equation. -x ^3/2 = -27

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297