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An aquarium tank can hold 7700 liters of water. There are two pipes that can be used to fill the tank. The first pipe alone can fill the tank in 77 minutes. The second pipe can fill the tank in 44 minutes by itself. When both pipes are working together, how long does it take them to fill the tank?
Assume that random variables X1,.....,X50 are independent and all have probability density function fX(x) = 1/x for 1
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
Calculate the standard deviation of the number of available rooms in that sample. Construct a frequency distribution of the sample mean, and plot a histogram of this distribution.
The company believes that it averages about the same weight per bag in each of two production lines. To test this idea, they will perform a hypothesis test to compare the two lines at the alpha level of 0.05. State the null and alternative hypothe..
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Does your analysis change if the term "average" refers to the mean? To the median? Explain what effect this misinformation might have on the perception of the nation's schools.
The cost per unit for ecah product, given each contract result, is shown in the following payoff table. Determine which product should be produced, using the following decision criteria.
For a population with µ = 62 and Ï? = 12, find the X-value that corresponds to each of the following z-scores.
Explain the applications of statistics in your own field (Business Administration/Accounting) - Construct a stem and leaf display.
What is the probability that the equipment will undergo maintenance if it is performing satisfactorily? what is the probability that the equipment will not undergo maintenance if it is not performing satisfactorily?
he standard deviation of the sample proprortion is 5.3%. How large a sample (to the nearest person) would be required to reduce this standard deviation to 3.7%?
Suppose we sample five boys and five girls, and find that the average height of the boys is 0.5 inches more than the average height of the girls.
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