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Divide your data in half, your first 8 observations and your last 7 observations. Then use ANOVA to test to see if there is a significant difference between the two halves of your data. This list of Webpages that Perform Statistical Calculations has several ANOVA calculators.
What is the probability that both defective lights will be found within three trials?
In a certain city, there are 100,000 persons age 18 to 24. A simple random sample of 500 such persons is drawn, of whom 198 turn out to be currently enrolled in college.
If two randoom samples of sizes n1 = 30 and n2 = 36 are selected independently from two populations with mean 78 and 85, and with standard deviations 12 and 15, respectively, then the standard error of the difference between Xbar1 and Xbar2 are eq..
Keith's florist has 18 delivery trucks used mainly to deliver flowers in the SC area. Of these 18 trucks, 5 have brake problems. A sample of 4 trucks is randomly selected. What is the probability that 2 of those defective have defective braked. Ro..
The weight of the first orange minus the weight of the second orange) is a random variable with standard deviation and individual outcomes are uncertain but happen in a predictable manner through time.
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
Compare the means of two populations using 96% confidence interval:
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.
Consumer Price Index is: a. a weighted aggregate price index where the weight for each item is its current-period quantity. b. a weighted aggregate price index where the weight for each item is its last-period quantity. c. an index that is designed t..
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
Shopper Trak is a hidden electric eye designed to count the number of shoppers entering a store. When two shoppers enter the store together one walking in front of the other, the following possibilities apply.
A random-effects ANOVA refers to the analysis where the levels included in the study represent a random sample of all levels that exist.
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