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1. Chebyshev's vs. the empirical theorem/rule. 2. Discrete variables vs. Continuous variables
Dr. S wishes to measure the effect of TV viewing on reading scores in elementary school children. The data for the sample are shown here. Assume the population is normal.
Simulate 50 observations from a normal distribution with mean 0 and standard deviation 1. make a normal plot.
In a BMT class test the scores of 8 students are: 11; 10; 6; 3; 11; 10; 9; 11. Assume the sores are a simple random sample from a normally distributed population. What is the point estimate of the standard deviation?
How does multilinear regression analysis apply to your profession? Specify the dependent value and the set of predictors. Where would you get the data?
An online book store wants to determine if there is an association between coupon redemption and gender. After a special coupon broadcast to its reward members, the following data on coupon redemption at check out were collected.
Suppose that among all participants, the mean test score is 70.07 and the standard deviation is 10.27. Use z-scores to interpret a raw score of 80. What is the corresponding z-score? How would you interpret this result? Show your work.
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
Construct a 95% confidence interval for the proportion of red candies. Using your same data determine if the proportion of green candies in a package of M&Ms is differen than what is claimed by the company.
State the null and the alternative hypotheses. Using the p-value approach, test to determine whether or not the mean age of all employees is significantly more than 40 years.
Teens were asked in the MTF 2006 survey how often they think about social issues (specific issues were not identified). The bivariate table includes responses organized by teen's race.
Critically discuss some examples of literature reviews and statistics used and available at your work place or organization? What are they used for and how are they determined?
Telephone calls enter a college switchboard at a mean rate of 2/3 call per minute according to Poisson process. Let X denote the waiting time until the tenth call arrives. what are the moment-generating function, mean and variance of X?
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