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How is an ANOVA used, what is the difference between comparing mean and comparing variances, what are the differences between one-way and two-way ANOVA?
What are the five steps in the hypothesis testing procedure, what does each step represent, what are the advantages and disadvantages of using a hypothesis testing procedure?
What is the significance of a 5% significance level? Why would you choose 5% as opposed to 10%? What are the statistically accepted guidelines for significance levels?
Generate a 95 % confidence interval for the difference in proportions of patients who report pain relief.
Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would
A and B are two intersecting sets, and a, b, ab, and x represent the usual symbols for the number of elements contained in the four defined areas of the associated Venn Diagram. Find the values of ab and a if:
Of the estimated natural gas reserves in North America, 4.59 *10^9 m ^3 are in United States. 2.66*10^9 m^3 are in Canada, and 1.99*10^9 m^3 are in Mexico.
Sampling variability refers to the idea that different samples will include different individuals
At the .01 significance level, can she conclude that there is a difference between how well the different tutorials work for the students?
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
Regression analysis works with the basic formula of a line, which is Y = mX + b. We can use it to look at causation. Think about the Lemonade Stand Game.
For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 5 of µ? Use the value 20 for the population standard deviation of scores on this subsection.
Make a scatter plot, illustrate the regression lines. Determine the correlation coefficient between husband’s and wife’s education for couples in which wife is employed full time?
Using Area of Residence (Area A or Area B) as my stratification factor, explain, in detail, how you would select a sample of 60 inhabitants by using stratified random sampling.
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