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The most famous geyser in the world is, old faithful in yellowstone national park, has a mean time between eruptions of 85 minutes. If the interval between eruptions is normally ditributed with a standard deviation or 21.25 minutes, answer the following questions what is the probabilty that a random sample of 20 time interval between eruptions has a mean longer than 95 minutes?
Household income does not tend to follow a normal distribution in a particular state, yet average income is approximately $45,000/year in this state, with a standard deviation of about $9000.
If an individual from this age group is selected, find the probability that his or her blood pressure will be between 70 and 95. Assume normal distribution.
The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
A machine produces parts with lengths that are normally distributed with ? = 0.59. A sample of 19 parts has a mean length of 76.26.
Suppose a recent poll of 1,000 people sets forth that 51% of Americans support the U.S. government's "War on Drugs." This poll is shown to have a margin of error of 2%.
What is the value of the sample mean resonance frequency? The confidence level for one of these intervals is 90% and for the other it is 99%. Which is which, and how can you tell?
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Express Courier Service has found that the delivery time for packages is normally distributed, with mean 13 hours and standard deviation 2 hours.
Design a calculator simulation to estimate the probability described in (a). Describe your simulation method clearly enough so that a classmate could carry it out without further explanation from you.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
An important issue facing Americans is the large number of medical malpractice lawsuits and the expenses that they generate. In a study of 1228 randomly selected medical malpractice lawsuits
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