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The Internal Revenue Service's uses a letter-opening machine to remove checks from envelopes. This machine has a probability p = 0.03 of failure for any envelope. On a certain day, n = 500, envelopes are independently handled by the machine. Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
Basic Statistics problem
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
State the null and alternative hypotheses you would use to test whether the year-end bonuses paid by Jones & Ryan were different from the population mean.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
LINEAR PROGRAMMING MODELS
Solve the equations using linear algebra
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
One person's file is chosen at random. Find out probability that selected person will fall into following categories. Book keeping.
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
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