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Question - Education and Child Development An elementary class rarely remains the same size from the beginning of the school year until the end. Families move in and out of the district, some students are reassigned, and scheduling conflicts necessitate changes. Suppose the change in the number of students in a class is a random variable with probability distribution given by
p(x) = |x|+1 /19 x = -3, -2, -1, 0, 1, 2, 3
a. Verify that this is a valid probability distribution.
b. Find the mean, variance, and standard deviation of the change in class size.
c. Suppose two classes are selected at random. Find the probability that both classes remain the same size for the entire year.
At the .01 significance level, can we conclude that there is more variation?
Write the regression. Interpret the regression constant and regression coefficient. Forecast a value for monthly salary.
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From previous work, the researchers expected the population of responses to be Normal. The insects are a random sample from a cockroach population grown in the laboratory. A 90% confidence interval for the mean amount of d-glucose in cockroach hin..
3M (www.3m.com) manufactures 65,000 products, ranging from Scotch tape to fi lm for solar-energy panels to dental braces. It makes these products in 214 plants located in 41 countries. Over the years, 3M had developed long, complicated supply chai..
Fracking has allowed energy producers to extract oil and natural gas from previously unrecoverable deposits.
According to the Wall Street Journal , an average of 44 tons of carbon dioxide will be saved per year if new, more efficient lamps are used.
a student club has 40 members including stacy and tom.a in how many ways can the club elect different individuals to
What is a multiple baseline design? Why is it used? Distinguish between multiple baseline designs across subjects, across behaviors, and across situations.
What proportion of the variation in listing price is determined by variation in the square footage? What proportion of the variation in listing price is due to other factors?
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