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Summer reading programs are very popular with children. At the Citizens Library, Team Ramona read an average of 23.2 books with a standard deviation of 6.1. There were 21 members on this team. Team Beezus read an average of 26.1 books with a standard deviation of 2.3. There were 23 members on this team. Did the variances of the two teams differ? Use α = 0.05.
Use the data above to construct a 95% confidence interval for the mean speed μ of vehicles traveling on Dan Allen Drive. (calculate y and s to 3 decimal places).
What information would you need to determine the probability that postage forone particular week will exceed $400? Why wasn't this information required for(a)
correlation measures the strength of the positivenegativelinearamount of relationship between two
Simulate 500 independent standard normal values. Use these to generate 250 pairs of bivariate normal vectors .Xi ; Yi /, with zero means, unit standard deviations, and correlation p D :25; :5; :75. Use your sim- ulated pairs to estimate P.X > 0; Y > ..
let 18 and 10 be the standard deviations of the independent random variables x and y respectively.what is the standard
a production process that fills 12-ounce cereal boxes is known to have a population standard deviation of 0.009 ounce.
Use the correct formula to find the probability that, out of 45 houses, exactly 4 of the houses will be burglarized. Show your calculations or explain how you found the probability.
As part of their application for a loan to buy Lakeside Farm, a property they hope to develop as a bed-and-breakfast operation, the prospective owners have projected:
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
a. Write an appropriate model (including an effect for weeks) and the sources of variability in an analysis of variance table. b. How would your model change if we analyze the total 2-week sales data? c. Run an analysis of variance on the 2-week sale..
What is the probability that the person in the ith position, 1 ≤ i ≤ b+g, is a girl?
question a researcher wishes to determine whether the average amount of bleaching agent in a 1kg packet of brand x
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