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Home >> Statistics and Probability
1. What is the relationship between confounding and internal validity?
2. What are experimenter expectancy effects, and how do researchers minimize them?
3. Should demand characteristics be eliminated or strengthened in an experiment? Explain.
Statistics and Probability, Statistics
In a management trainee program 80% of the trainees are female, 20% male, A total of 90% of the females attended college, while 78% of the males attended college. A management trainee is selected at random. What is the p ...
A puck company wants to sponsor the players with the 10% quickest goals in hockey games. The times of first goals are normally distributed with a mean of 8.54 minutes and a standard deviation of 4.91 minutes. How fast wo ...
Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger throughout our lifetime. In o ...
Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two units of the population mean. Assume a standard deviation of 4.82 in a normally distributed population.
Let's pretend that in a hospital, 7% of patients are "high-risk" while the others are "lower-risk". For patients that are high-risk, 75% will be re-admitted within 30 days. For "lower-risk" patients, the 30day re-admitta ...
SmithCo is a supplier to many brand name makers of mobile phones. SmithCo manufactures the external shells that enclose mobile phones. The strength of a shell is measured by applying increasing pressure to the shell and ...
A box contains 14 large marbles and 11 small marbles. Each marble is either green or white. 8 of the large marbles are green, and 5 of the small marbles are white. If a marble is randomly selected from the box, what is t ...
Two people agree to meet at a coffee shop. They each independently pick a random moment in time between 8 a.m. and 9 a.m. and show up exactly at their selected time. But they are very impatient, and only stay for 10 minu ...
Consider projects A and B with the following cash flows: C0 C1 C2 C3 A -$29 $18 $18 B -$54 29 29 What is the profitability index of each project? (Do not round intermediate calculations. Round your answers to 2 decimal ...
A stock price is currently $112. Stock price move up by 10% or down by 14%. The risk-free interest rate is APR 2% with continuous compounding. What is the value of a six-month European put option with a strike price of $ ...
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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