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A study of 50 professors showed that the average time they spent creating test questions was 17.5 minutes per question. The standard deviation of the population is 5.8. What is the 99% confidence interval for the average number of minutes it takes to create a test question?
You are trying to determine the statistical significance of an equation. Given the following information, test the slope of the equation at the 95% level of confidence.
Identify at least TWO EXAMPLES of time series data. You may find it necessary to consider how your organization(s) have utilized time series data to "forecast".
A sample of 25 diff. payroll dept found that the employees worked an average of 310.3 days with a std dev. of 23.8 days. what is the 90% confidence interval for the average days worked.
Consider a dipole of strength D, oriented along the x-axis and located at the point x = ε/2, y = 0, z = 0, and a dipole of strength -D, oriented along the x-axis at the point x = - ε /2, y = 0, z = 0. Write the expression for the potential for thes..
Use software to generate your own sample of 500 uniform random variables on the interval from 0 to 1, and perform the goodness-of-fit test
Draw and label distribution used and position of values found.
In a large western university, 15% of the students are graduate students. If a random sample of 20 students is selected, what is the probability that the sample contains:
The boat plug diameters are specified to have a normal distribution with a mean of 4 inches and a standard deviation of 0.10.
For that group, the mean weight was 2919 pounds, with a standard deviation of 531.5 pounds. Is this strong evidence that the mean weight of all cars is not 3000 pounds?
wayne collier designed an experiment to measure the fuel efficiency of his family car under different tire pressures.
Using the level of significance of .01, test the claim that the proportion of college students who are not on financial aid of any sort is greater than 15%.
The 90 women who participated in the study were not randomly selected from a population. Explain why the Random condition is still satisfied.
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