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A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training and for the week following training the number of headaches is again measured. The data are as follows: Before--After 6--4 5--1 3--3 3--1 6--2 2--1 4--3 4--2
a. Compute the mean amd variance for the sample of difference scores.
b. Do the results indicate a significant difference? Use a two-tailed test with a=.05
a confidence interval is desired for the true average stray-load loss u watts for a certain type of induction motor
With the exponential function e^x and logarithmic function log x how do I graphically show the effect if x is doubled?
The population's standard deviation is 2.00 hours per week. Based on a sample of 49 students, Healthy Lifestyles Incorporated (HLI) would like to apply the central limit theorem to make various estimates.
The average cost of repairing a VCR is $80 with a standard deviation of 19. if one VCR is repaired, find the probability the cost is between 70 and 90.
Extreme value or is it a fairly typical sample mean? For a sample of n=36 scores, would a sample mean of M=55 be considered an extreme value or is it is fairly typical sample mean?
a researcher reports an f-ratio with df 3 36 from an independent-measures research study.a. how many treatment
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
The rest type AB. Someone volunteers to give blood, what is the probability that this donor has the complement of type O?
1.i have computed an analysis of variance for three groups with 10 observations per group. the degrees of freedom for
Suggest applications of nonparametric methods to solving business related problems. Describe the example. How are you or could you use nonparametric methods to solve business related problems?
Calculate the probability of a type ii error for the following hypotheses when µ = 37:
A general contractor is considering purchasing lumber from one of two different suppliers. A random sample of 12 "2x4's" of a certain length of each board is measured.
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