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Question: A water glass is shaped like a cylinder with height 6in. and diameter 2in. How many times as much water can a glass twice as tall and twice as wide hold?
a. 2
b. 4
c. 8
d. 16
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
We have discussed two different methods for making statistical inferences such as developing interval estimates and conducting hypothesis tests. These methods are the "Critical Value Method" and the "P-Value Method".
What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error?
If you draw one ball from the urn what is the probability that it is blue or white?
Identify at least three methods of statistical inference. Describe in detail each method and how you could use this method in your discipline. You may not use the same tests indicated in your research proposal.
Discuss why the independent t-test is called independent. What does this analysis have to do with variance within and between groups?
You are preparing a report to present to the Public Health Council on the declining rates of gonorrhea in your state in both men and women over the last 10 years.
If you want to be 95% confident of estimating the population proportion to within a sample error of +and - .05 and there is historical evidence that the population is approximately .35, what sample size is needed.
Determine the test sequence that minimizes the total expected cost of testing an item. Prove that your proposed sequence is optimal in minimizing the total expected cost of testing an item.
Standard deviation can be assumed known with Q=.28 What is the 95% confidence interval estimate of the mean undergraduate GPA for students admitted to the top graduate schools?
There were 20 students in the class. Develop an ANOVA table for the regression analysis of hours studied as a predictor of the grade earned on the first statistics exam.
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