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Question: Find the critical t value that would be used to construct the confidence interval for the slope coefficient in a regression analysis for each of the following situations:
a. For 95% confidence, based on a sample size of n¼298.
b. For 99% confidence, based on a sample size of n¼15.
c. For 95% confidence, based on a sample size of n¼25.
d. For 99.9% confidence, based on a sample size of n¼100.
It can be an arduous task to create a test that measures what is intended. In detail explain what are the traits of a properly created test?
you decide to test the effectiveness using the drug and a placebo. you select a select a group of 500 subjects and
A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was measured
What are the measures of central tendency? What are the characteristics of mean, median, and mode? What is the sampling error? Name 6 reasons why we use samples instead of an entire population.
Post hoc tests when you have more than two groups on an IV (one-way ANOVA) - Main effects and interactions (factorial ANOVA), and Working with multivariate analyses of multiple DVs (one-way MANOVA).
An economics professor gives her students an exam. The exam scores have a mean of 75 and a standard deviation of 9. How would the value of the standard deviation change if the professor added 5 points to each students exam score?
Examination of individual measurements shows that they are close to Normal. If the process mean is set to the target value, about what percent of films will meet the specifications?
a surgical technique is performed on seven patients. you are told there is a 70 chance of success. find the probability
State the hypotheses that you are testing. Determine the critical value of χ2 and your decision rule. Calculate the χ2 test statistic for this data. (Show all workings). State your decision and conclusion.
This table gives three measurements of 10 samples made in a production run. Use statistical process control method to solve problem.
Suppose that the population of grade point averages (GPAs) for students at the end of their first year at a large university has a mean of 3.1 and a standard.
To accomplish this goal, perform the following operations on the attached Excel data: Calculate the average Quiz Score [i.e. (points earned)/(points available)] for each student and Calculate the average Lab Report Score [i.e. (points earned)/(points..
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