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Determine the minimum sample size required when you want to be 80% confident that the sample mean is within 1.3 units of the population mean. Assume a standard deviation of 9.24 in a normally distributed population.
Test the following hypotheses of the difference in population means by using the following data (α = .10) H0: µ1- µ2=0, Ha: µ1- µ2 Sample 1 : X=51.3 σ2=52 n=31; Sample 2: X=53.2 σ2=60 n=32 Use the critical value method t ...
Suppose that the government is coming up with an employment protection policy that requires firms to pay each laid-off worker two more months of salary after they are laid off. This essentially changes the variable adjus ...
You are given the following cost function: TC=80Q--4Q^2+0.1Q^3 a. Derive the average variable cost, average cost, and marginal cost equations. b. Over what range of output does economies of scale exist? Diseconomies of ...
The equation used to predict how long a cold will last is y=-1.8 + 0.09x1 + 3.2x2 - 1.9x3, where x1 is person's temperature on the first day, x2 is number of people seen each day, and x3 is the amount of sleep the person ...
In families with four children, you're interested in the probabilities for the different possible numbers of girls in a family. Using theoretical probability (assume girls and boys are equally likely), compile a five-col ...
The label on a can of sardines indicates the can contains 10 sardines. You open up 100 cans and record the number of fish in each can. You find the sample average is 9.5 and sample standard deviation is 1. Calculate and ...
You created a new parenting program and you are interested in testing its impact on parenting skills. To do so, you recruit a sample of parents and have them make a self-report parenting skills scale before participating ...
A highway rest area contains a vending machine that dispenses cups of coffee. The amount of coffee that the machine provides when a purchase is made approximately follows a uniform distribution between 200 and 250 ml. (a ...
Briefly explain the meaning of the t-test for regression analysis. How can the "rule of two" be used to evaluate t-ratios?
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As