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Suppose you have two sets of normal data (symmetric, bell-shaped distributions), both with a mean of 15. The variance for sample A is 2.5, and the variance for sample B is 5.7. Sketch the general shape of each of these distributions on a single plot.
The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes. What is the probability that the arrival time between customers will more than 20 minutes?
In-Home stability ratings of children and teenagers age 4 to 14 years who have been diagnosed with ADHD and who are being treated with neurotherapy differs from in-home stability ratings of children and teenagers age 4 to 14 years who have been di..
a loan officer at a bank rates applicants for credit. ratings are normally distributed. the mean is 240 and the
Many newspapers carry a certain puzzle in which the individual must unscramble letters to form words. How many ways can the letters of YARNLE be arranged?
consider the experiments first draw a poisson random variable n with parameter ?. then perform n independent bernoulli
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a t..
the table gives population densities for ring-necked pheasants in number of pheasants per acre on pelee island
Canceled on the day of the flight is (1.2%,4.5%). What is the point estimate of the mean percentage of reservations canceled on the day of the flight?
With this important detail, are there any significant differences with LSD?
The probability of a bulb lasting less than 2300 is .1573. The maximum probability of a bulb lasting less than 2300 hours should be only 5%. What must change specifically? How would that change be obtained practically?
Selection of a location for a prospective Wal-Mart creates many questions for executives. A suitable site would be one that has an adequate demand for Wal-Mart offerings, sufficient transportation resources, and an available labor force.
suppose the time to prepare a bed at a hospital is modeled with a random variable with a mean of 20 mins and a variance
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