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If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
Statistics and Probability, Statistics
The distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.7 ounces and standard deviation 0.2 ounces. a) What is the probability that the average weight of a random sam ...
According to a Pew Research Center poll, 22% of adult Americans have contributed to an online fundraising project. A random sample of 100 adults is selected. Let the random variable X be the number of adult Americans who ...
You are working with a MOE of +/-4% and a confidence level of 95%. P and Q =.50, and your CPI is $25.00. The company you work for needs to make a decision as to whether they may need different advertising for men and wom ...
An equally weighted portfolio consists of 41 assets which all have a standard deviation of 0.137. The average covariance between the assets is 0.118. What is the standard deviation of this portfolio expressed as a percen ...
Across the nine cities, in multilevel, multivariate analysis, controlling for income inequality (GINI coefficient), percent living in poverty and percent Non-Hispanic Black population, the ZIP code level overall HIV diag ...
1. Suppose that a company selects two people who work independently inspecting two-by-four timbers. Their job is to identify low-quality timbers. Suppose that the probability that an inspector does not identify a low-qua ...
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 $ ...
Past data from a specialized lung cancer clinic show that 10% of patients entering the clinic have lung cancer. Data also shows 5% of the patients are smokers. Additionally, it is found that 7% of the patients are smoker ...
During a certain week the mean price of gasoline was $2.719 a gallon. A ronadom sample of 32 stations is drwn. What is the probability that the mean price was between $2.695 and $2.716. Assume o=$0.048.
How to calculate the sample space? Problem: Consider the experiment of drawing two cards from a deck in which all picture cards have been removed and adding their values (with ace = 1)
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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