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2.* Suppose that X ,-- N3(0, E), where(1 p 0 E= p 1 p . 0 p 1(a) Find Cov(Xi + X2 + X3, X1 - X2 - X3 ) .(b) Show that there is a value of p for which the covariance in (a) is zero. For this value, are the two random variables in (a) independent?
Maria Gomez, a research analyst in the state department of health, has undertaken a study of the possible consequences of overbuilding hospital facilities.
The underlying data are in file XR10033. Identify and interpret the p-value for the test. Using the 0.025 level of significance, what conclusion will be reached?
A researcher has been measuring the time for pairs of 8 year olds who have just met each other to work together to solve a problem. Construct a distribution table for these data. include the colums and values for proportion and percentage.
Draw the scatter diagram. Does it appear that x and y are related? If so, how? Test to determine whether there is evidence of a linear relationship.
If the component lifetimes are independent uniform (0,1) random variables, determine the probability that the system life will be less than ½ .
A gun is fired straight upward. The bullet leaves the gun at 1000 ft. per sec. The equation for the bullet's velocity is v = -32 t + 1000. What is the velocity at 3 sec.?
Let A be an M x N matrix and X an N x 1 matrix. (a) How many multiplications are needed to calculate AX?
for which of the following variables would cumulative percentages be readily interpretable?a. number of adults in a
1. for a sample of 36 houses what would you expect the distribution of the sale prices to be? a real-estate agent has
What are the key conceptual differences between these 3 methods? In other words, under what conditions do we choose each method for our analysis, and why?
you roll two fair dice a green one and a red one.a what is the probability of getting a sum of 6? enter your answer as
Determine whether the given value is a statistic or parameter. in a study of all 1900 students at a college, it is found that 25% own a computer.
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