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Say that every single class in masters degree program has 5% failure rate per month. Say also that when the student fails once, he or she drops from program. There are twelve months. Given the cohort of 100 which starts the program, about how many are left after twelve months?
You are curious about whether the professors and students at your school are of different political persuasions, so you take a sample of 20 professors and 20 students drawn randomly from each population.
What are the mean and the standard deviation of the number of firms that purchase a Unix machine from Sun Microsystems?
Which option produces the smallest risk of a Type I error?
A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol over 200) is 30% in children 2-6 years of age. If 12 children are analyzed,
So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.
Based on your experience using ANOVA and Nonparametric tests, what additional information would you recommend to the key decision maker solve the challenges given in a company that provides software solutions to wide range of clients?
Obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram
Why do so many of life's events share the same characteristics with Central Limit Theorem? Why are estimations and confidence intervals important?
Use RNG in Excel to generate n = 5 observations from the Normal distribution N(20, 5). Test H0: μ = 20 versus H0: μ ≠ 20 at the α = 0.05 level of significance. Repeat this process 100 times and then count the number of times that you reject H0.
Once again, suppose that the standard deviation of the average or median is $5.00. Which is the probability that the average or median of the sample is greater than $22.50 but less than $25.00?
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
If the server has 40 customers in one shift, what is the probability that her total tips are less than $250? (Assume that these 40 customers represent a simple random sample).
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