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1. What are the assumptions regarding a small two sample t-test and what Excel aid would you use to perform the test, Data Analysis or MacDoIt?
2. What are the assumptions regarding an ANOVA test and what Excel aid would you use to perform the test, Data Analysis or MacDoIt?
3. What are the assumptions regarding a Chi-square test?
Based on a study of heights of men and women who do gymnastics, a researcher concludes that the exercise from playing gymnastics causes people to become shorter. Do you agree with this conclusion?
Explain the difference between descriptive statistics and inferential statistics with less than 50 words? Name two graphs that can be used for describing qualitative data and two for describing quantitative data. Name one graph that can be used to ..
What is the idea of "least squares"? What is the connection between "least squares" and linear regression?
Is there evidence that population mean amount is different form 8.17 ounces? (Use a 0.05 level of significance.) with sample standard deviation of 0.051 ounce.
What test can be performed to compare the percentage of participants who developed abnormal triglyceride levels between the vitamin A and the trace group? Report a two-tailed p value.
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that:
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make?
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1%.
One measure of the overall sampling error in the entire distribution of sample means is the
When using the F-statistic for hypothesis testing of the variance, which sample variance is the numerator and which sample variance is the denominator?
In your own words, describe the concept of correlation, include the coefficient of correlation (r) and the coefficient of determination (r2) in your description.
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