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A researcher hypothesizes that people who listen to classical music have higher concentration skills than those in the general population. On a standard concentration test, the overall mean is 15.5. The researcher gave this same test to a random sample of 12 individuals who regularly listen to classical music. Their scores on the test were as follows:
16, 14, 20, 12, 25, 22, 23, 19, 17, 17, 21, 20
Is this a one- or two-tailed test?
Conduct all 6 steps of the appropriate statistic. Be sure to label all six steps.
Calculate and interpret the effect size for this test.
Analyze the data to make conclusions. Perform test(s), interaction plot and post hoc multiple comparisons if needed.
Should Mark use the study? Why? What is the maximum amount Mark should be willing to pay for this study? What is the maximum amount he should pay for any study?
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?
Concrete blocks are to be used in the foundations of several buildings. The specifications state that the minimum arithmetic mean compressive strength of a sample of blocks must be 1,000 pounds per square inch (psi).
Determine the coefficient of determination R 2 . Determine standard error of the estimate s e .
The top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
What is a point estimate for the population mean µ?
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
The original simple form of the Connecticut state lottery (ignoring a few gimmicks) awarded the following prizes for each 100,000 tickets sold. The winners were chosen by drawing tickets at random. If you hold one ticket in this lottery, what is y..
The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use alpha = .05
Generate survival times X from an exponential distribution with rate lambda=1 with a censoring distribution C being exponential with rate theta = 2/3. Then Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000..
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