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Playground:
Some people have been complaining that the children s playground at a municipal park is too small and is in need of repair. Managers of the park decide to survey city residents to see if they believe the playground should be rebuilt. They hand out questionnaires to parents who bring children to the park. Describe possible biases in this sample.
if two fair dice are rolled six-sided what is the probability that the sum of the numbers rolled will add up to
Estimate the true proportion of all Americans who are in favor of gun control legislation using a 90% confidence interval.
a. Plot a histogram for these data. b. What kind of theoretical distribution might you select to represent the distribution of the number of nesting sites? Why? c. Estimate the parameters of the theoretical distribution by calculating the sample mean..
In Megabucks, a player who correctly chooses five out of the six winning numbers gets $400. What is the probability of winning $400?
Let Rev be the operator that reverses the sequence of characters within a string. For example, Rev(abc) = cba. Let R be any regular expression. Rev® is the set of strings denoted by R, with each string reversed. Is Rev(R) a regular set? Why?
Using the attached file, Activity 8.sav, perform a MANOVA. Group is the fixed factor and LDL and HDL are the dependent variables. Please include Multivariate Tests, Tests of Between-Subjects Effects, Parameter Estimates, Estimated Marginal Means, ..
emily is interested in understanding if there is a relationship between whether or not people think the diversity
joint pmf p(X1,X2)=(X1+2X2)/18, (x1,x2)=(1,1),(1,2),(2,1),(2,2), zero elsewhere. Determine the conditional mean and variance of X2, given X1=x1, for x1=1 or 2. Also compute E(3X1-2X2).
an article reported that in a study of a particular wafer inspection process 356 dies were examined by an inspection
in the last quarter of 2007 a group of 64 mutual funds had a mean return of 4.8 with a standard deviation of 5.5. if
2 prizes of $1250, and 1 prize of 3000. Assume that 22,000 lottery tickets are issues and sold for $1. What is the lottery's expected profit per ticket?
1. Calculate the value of the test statistic. 2. Compute the observed significance of the test.
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