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The managers in a company's East and West regions were rated on the basis of the company's evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calculation.
Region Manager Rating Region Manager Rating
West 1 74 East 1 81
West 2 88 East 2 63
West 3 78 East 3 56
West 4 85 East 4 68
West 5 100 East 5 80
West 6 114 East 6 79
West 7 98 East 7 69
Compute the coefficient of determination for bone loss and women's age and describe what this statistic means.
According to the patient's history and physical examination. What are the chances of herniation if the MRI is positive?
A method of determining if relationships exist between two variables is:
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
In a sample of 50 members of a local health club you find that 12 of these members meet weekly with a physical fitness trainer and that the average body mass index (BMI) of these 12 members is less than the average BMI of the other 38 club members..
Two types of flares are tested for their burning times (in minutes) and sample results are given below.
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. An analysis decides to remove records that have missing values. About how many records would you expect would be remov..
What is the difference between the Wilcoxon signed-ranks test and the Wilcoxon rank-sum test? no minimum word count.
In chi-square goodness-of-fit test when there is close agreement between observed frequency and expected frequency, chi-square test value will be small.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
The casino game craps is based on rolling two dice. Here is the assignment of probabilities to the sum of numbers on the up face when two dice are rolled:
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