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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?
In a group of seven adult friends, what is the probability that: a) no one has done a one-time fling?
If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be?
A random sample of 40 clock batteries of this brand was selected. There is the probability of 0.95 that the sample mean lifetime will be less than t hours.What is the value of t?
A random sample of 51 observations was selected from a normally distributed population. The sample mean was xbar = 88.6, and the sample variance was s2 = 38.2.
Looking for a good original (yet cited) response to this definition. And if you can describe two common ones with an example for each that would be great.
Determine 95% confidence interval evaluate for average number of years served by all Supreme Court justices?
(a) What is the relative frequency (i.e., proportion) of observations falling in the 0.260-0.280 interval? (Give your answer to four decimal places.) (b) What is the shape of the data distribution?
Tom Smith wants to test the hypothesis that adult men have a mean weight that is greater than 150 pounds. Tom surveys the adult male members of his family and obtains 40 sample values
Finding the probability of sample and describe the sampling distribution of the sample means.
Compare the unconditional probability of having the disease to the conditional probability of having the disease given the test says you have the disease.
What is them 98% confidence interval for the average number of minutes it takes to create a test question?
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
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