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You've obtained a chi square of 25.32, and it's significant. You want to test how strong the relationship between these two variables is. You have a sample size of 450. What's your phi-coefficient?
Production yields vary and can be high or low on a given day. If they are high, you want to find out why so that yields could be similarly increased.
Show the sampling distribution of the mean amount of Medicare spending for a sample of fifty 2003 enrollees. What is the probability the sample mean will be within, plus or minus, $300 of the population mean?
Suppose that X is a normally distributed random variable with mean 10 and variance 25and we take a simple random sample of size 3 and defineW = 0.4X1 + 0.3X2 + 0.2X3.Find P(W > 12)
an inspector correctly identifies defective products 90 of the time. for the next 10 products the probability that he
Let {Yt} be a doubly infinite sequence of random variables that is stationary with autocovariance function γY . Let Xt = (a + bt)st + Yt, where a and b are real numbers and st is a deterministic seasonal function with period d
Four different types of fertilizers are used on raspberry plants. The number of raspberries on each randomly selected plaint is given below.
Although the two samples have an identica winning percentage,one is significant and the other is not. Explain why the two samples lead to different conclusions.
Show that if (a_n)[n=1,infinity] and (b_n)[n=1,infinity] are equivalent sequences of rationals, then (a_n)[n=1,infinity] is a Cauchy sequence if and only if (b_n)[n=1,infinity] is a Cauchy sequence.
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
I need to find the joint and marginal distribtions for this problem. Since they are independent I know that f(x,y) = fx(x) * fy(y) but do not understand how to take that and the data given in the problem to find the marginal and joint distribtion
the answer should be 4e-6the current test for the h7n9 avian flu is a blood test. it requires withdrawing blood from
Dana and Cathy are playing tennis. The probability that Dana wins at least one out of two ames is 0.3. What is the probability that Dana wins at least one out of four?
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