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What is the difference between dependent and independent variables? On which side of the regression equation does each lie?
Describe how Doane's rule relates to the number of allowed independent variables. Why is this important?
(a) Why is this a legitimate finite probability model? (b) What is the probability that the person chosen is a 15- to 19-year-old who lives with others?
suppose we find a 95 confidence interval for the proportion of illinois residents who support the current pension
A shipment of 150 television sets contains three defective units. If a vending company buys three of the units in the shipment, what is the probability that at least one of the units is defective?
A recent article in The Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent):4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6
Can you conclude that u1 is not equal to u2 at alpha=.05? State the hypothesis in orders of 1-2. construct a 99% confidence interval for the difference in true means. State the confidence interval in terms of 2-1.
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
The number of lightning strikes in a year at the top of a particular mountain has a Poisson distribution with a mean of 4.2. Find the probability that in a randomly selected year, the number of lightning strikes is 0.
Consider a level α = .10 test of H0 (8.1) versus the alternative τ > 0 based on K. How many bivariate observations (n) will we need to collect in order to have approximate power at least .95 against an alternative for which τ = .6?
The frequency response of a process G(jω) is shown in Figure P8.23. Deduce the type number (number of integrations) for the system. Determine the transfer function of the system, G(s). Calculate the error to a unit step input.
Linear programming problems. Computethe following linear programming problem. Among which of the following points (X,Y) is feasible.
Compute the mean and variance of the number of bottles imported. Compute the mean and variance of the number of cigarette cartons imported. Compute the covariance and the coefficient of correlation.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
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