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To test effectiveness of treatment, a sample of n = 25 people is chosen from normal population with mean of µ = 60. After treatment is administered to individuals in sample, sample mean is found to be M = 55.
a. Determine Cohen's d measure effect size for both tests (σ = 20 and σ = 10).b. Explain how sample size influence outcome of the hypothesis test. How does sample size influence measures of effect size?
Which of the following does not explain a possible relationship between variables when the null hypothesis is rejected
As part of a long-term study of individuals 65 years of age or older, sociologists and physicians at the Wentworth Medical Center in upstate New York conducted a study to investigate the relationship between geographic location and depression.
Monthly sales figures for store are as follows. Determine the:Mid-rangeStandard Variance.
What is the mean of the sample proportion of pieces of unread mail? What is the standard error of the sample proportion?
The amounts of money requested on home loan applications at a particular bank follow the normal distribution, with a mean of $80,000 and a standard deviation of $24,000. A loan application is received during the day.
In a one-way ANOVA analysis of 3 treatments, with the total number of 9 observations, with an equal number of observations in each treatment, mean-square-error (MSE) was found to be 24.905.
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your pooled proportion?
As the Marketing Director of Harley-Davidson, you need to determine what your customers would like in the next model. You put a survey on the Harley Web site. Is this a good frame from which to select your sample? Explain.
Bill Russ, the production manager at Ross Co., maintains detailed records on number of times each machine breaks down and requires service all through the week. Bill records show that the Puret grinder has required repair service according to the ..
Evaluate the mean wait time and throughput rate
Determine the mean and the standard deviation of the sample.
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
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