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Suppose that the incomes of all people in the United States who own hybrid (gas and electric) automobiles are normally distributed with a mean of $78,000 and a standard deviation of $8300. Let be the mean income of a random sample of 50 owners of such automobiles. Calculate the mean and standard deviation of and describe the shape of its sampling distribution.
Use the Poison distribution to find the indicated probabilites. Find the probability of 6 dandelions in an area of 1 m ²
Assume that a lot from product 5% non-conforming is submitted. Using Poisson Distribution compute the approximate probabilities that: the lot will be accepted and still in a reduced inspection.
Compute mean absolute percentage error (MAPE) of the forecasts.
AVX Stereo Equipment, Inc recently began a "no hassles" return policy. A sample of 500 customers who had recently returned items showed 400 thought the policy was fair, 32 thought it took too long to complete the transaction, and the rest had no o..
explain the general rationale behind using a z-score for describing how an individual performed on an exam compared to
question 1the following artificial data record the length of stay in days spent on a psychiatric ward for 28
Thirty-five sophomores, 37 juniors and 37 seniors are randomly selected from 247 sophomores, 413 juniors and 348 seniors at a certain high school. What sampling technique is used?
The quality control process at a manufacturing plant requires that each lot of finished units be sampled for defective items. Twenty units from each lot are inspected.
Develop the "best" regression model possible using this set of variables to help you predict the Risk. State your final model. Interpret the coefficients for the model (i.e. what do the numbers mean?).
Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.
as reported by a spokesperson for southwest airlines the no-show rate for reservations is 16. in other words the
wisconsin is an important milk-producing state. some people might argue that because of transportation costs the cost
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