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Suppose that a random sample of n observations is drawn from a t distribution with a degrees of freedom. Show that the asymptotic distribution of both the sample mean X" and the sample median X" is normal; and determine the positive integers a for which the variance of this asymptotic distribution is smaller for X" than for X".
Adjust the data so that you can test the director's claim using a test statistic whose sampling distribution can be approximated by a chi-square distribution.
Secondhand smoke is somewhat harmful or very harmful. Is there statistically significant evidence against the representative's claim? Why or why not?
two people are going from seattle to portland. alice has 50 chance of arriving at 500 and a 50 chance of arriving at
Find the probability that y is between 40 and 50 milliseconds.- Find the probability that y is less than 30 milliseconds.
If two people are randomly selected, what is the probability both are hopelessly romantic? What is the probability at least one is hopelessly romantic.
to test the hypothesis h0 ? 100 vs. h1 ? gt 100 a z-score of 2.8 is calculated. the probability of observing a z-score
a statistics professor assigned various grades during the semester including a midterm exam out of 100 points and a
The appropriate probability concepts and your application of them to find resulting data to limit the uncertainty within this business decision.
a. What is the predicted change in output if labor increases by 1 % , holding capital constant?
According to Money, the average home in Ventura County, California, sells for $647,000. Assume that this sample mean was obtained from a random sample of 200.
For a multiway contingency table, when is a logistic model more appropriate than a loglinear model, and when is a loglinear model more appropriate?
Draw the Normal model for tree diameters.- What size would you expect the central 95% of all trees to be?- About what percent of the trees should be less than an inch in diameter?
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