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Mr. Jones is about to purchase a business. There are two businesses avail-able. The first has a daily expected profit of $150 with standard deviation $30, and the second has a daily expected profit of $150 with standard deviation $55. If Mr. Jones is interested in a business with a steady income, which should he choose?
Find the expected value and standard deviation of your prospective winnings.- You play twice. Find the mean and standard deviation of your total winnings.
Suppose that that download time is normally distributed with a standard deviation of 0.2 seconds. What is the probability that a download time is less than 1 second?
An investor wants to compare the risks associated with two different stocks. One way to measure the risk of a given stock is to measure the variation in the stock's daily price changes.
From a previous study, the standard deviation of the ages is known to be 3 years.
Among the 80 controls, 35 reported drinking at least 4 cups of coffee per day, whereas 22 of the 82 cases drank 4 or more cups. Test whether cases and controls drink the same amount of coffee.
a researcher reports that the correlation between age and physical health of adults over 50 is -.69. one can conclude
The distribution of hours worked per week by husbands in the United States in the early 1990s had mean 42.6 and standard deviation 12.9.
Interstate 90 is the longest of the east-west U.S. interstate highways with its 3,112 miles stretching from Boston, MA at I-93 on the eastern end to Seattle WA at the Kingdome on the western end. It travels across 13 northern states; the number of..
Compute the average, minimum, maximum, and standard deviation for Percentage Taxes column for all homes. Create a new worksheet and label it as Statistics.
a researcher measures the extent to which years of marriage predict perceptions of forgiveness. which factor is the
I roll a random number of dice. If the number of dice rolled has the Poisson (12) distribution, find (and justify your answers).
What does the shot noise on the power line look like? - Sketch a possible member function of the shot noise process.
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