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A final exam in Math 157 is normally distributed and has a mean of 75 with a standard deviation of 12. If 36 students are randomly selected, find the probability that the mean of their test scores is greater than 70.
Write down the differential equations which describe the probabilistic behavior of the unit in time as a Markov process.
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
What is the probability that: The amount requested is $80,000 or more?
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
(a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
Given that X1 is in the model, does X2 contribute to predicting the dependent variable at the .05 significance level?
Compare the means of two populations using 96% confidence interval:
Describe the circumstances under which you should use ANOVA instead of t tests, and explain why t tests are inappropriate in these circumstances. Find a peer-reviewed article that reflects these circumstances, describe the research conducted (i.e...
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
One-way Analysis of Variance (ANOVA) test - How many treatments are there and What is the total sample size?
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