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When is a permutation test valid? You want to test the equality of the means of two populations. Sketch density curves for two populations for which
(a) a permutation test is valid but a t test is not.
(b) both permutation and t tests are valid.
(c) a t test is valid but a permutation test is not.
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
How about the standard deviation? Do you think we can make some more intelligent statements about the two instructors when we have the standard deviations?
Find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable si normally distributed.
discuss the various sampling methods we might use in determining which items to include in a
what is the major shortcoming of both the maximin and maximax criteria?please answer in at least 3 sentences but no
the weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of
What is the correction for continuity and why is it employed when the normal distribution is used in approximating the binomial distribution?
In passing, Ben also cryptically comments: By testing the signs of the endpoints of the intervals, it is possible to break mul-interval into nine cases, only one of which requires more than two multiplications. Rewrite this procedure using Ben'..
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the company is currently producing has a normal distribution with an average of 7.5 minutes and a standard deviation of 1.2 minutes.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
For a population with a mean of (u)=50 and a standard deviation of (o)=10, how much error on average would you expect between the sample mean (M) and the population mean for the following samples
Diamonds and Hearts are red and Clubs and Spades are black. Suppose you randomly select three cards from the deck. The outcome of interest is the colour of each of the selected cards.
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