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Home >> Statistics and Probability
1. What is confounding of variables?
2. What is meant by the internal validity of an experiment?
3. How do the two true experimental designs eliminate the problem of selection diff erences?
Statistics and Probability, Statistics
A cell phone company offers 15 different voice packages and 15 different data packages. Of those, 6 packages include both voice and data. How many ways are there to choose either voice or data, but not both?
A factory makes parts for laptop computers, including screws. The screws are required to have the right length. The lengths of the screws obey a normal distribution with mean μ=4.25 millimeters and standard deviation σ=0 ...
Suppose a machine has two components that prevent injury; component A and component B. If either of the components fail, an employee will be injured. It is important to note that both A and B cannot fail at the same tim ...
A 5.4 percent corporate coupon bond is callable in ten years for a call premium of one year of coupon payments. Assuming a par value of $1,000, what is the price paid to the bondholder if the issuer calls the bond? Amoun ...
A pawnshop will lend $4,750 for 45 days at a cost of $35 interest. What is the effective rate of interest? (Use a 360-day year. Do not round intermediate calculations. Input your answer as a percent rounded to 2 decimal ...
Suppose the chance of selecting a female adult at random in the population is exactly π= 0.5 (ie: 50%). What is the probability that I choose 10 adults at random and I get the number of females in the sample to be betwee ...
Consider random samples of size 800 from a population with proportion 0.60. (a) Find the mean and standard error of the distribution of sample proportions. Round your answer for the mean to two decimal places, and your ...
a) One bond has a coupon rate of 8 percent, another a coupon rate of 12 percent. Both bonds pay coupons annually, have 10-year maturities, and sell at a yield to maturity of 10 percent. If their yields to maturity next y ...
At a large university, the probability that a student take calculus and is on the dean's list is 0.048. The probability that a student is on the dean's list is 0.29. Find the probability that the student is taking calcul ...
1. Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 89 tons of coal into each car. The actual weights of coal loaded ...
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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