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In the past an autoobile repair shop owner has noticed that sales increased ats certain economic indicators decreased. Based on forecasts of these economics indicators and past observations, the owner has assigned probabilities to sales increases as follows:
Sales increase Probability5% 0.0510% 0.1515% 0.3520% 0.3025% 0.15
Calculate the expected sales increase and the standard deviation.
There are two boxes, Box A and Box B. Box A has 40 tags with the number 1, 50 tags with the number 10, and 10 tags with the number 100. Box B has 40 tags with the number 100, 50 tags with the number 10, and 10 tags with the number 1.
Based on point estimate of each sample. Explain how confidence intervals will change depending on whether population standard deviation is known or unknown.
Standard deviation of 50. what is the probability that next year the number of burgalaries will be less than 250? less than 300 and more than 350?
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.
What is the mean of this uniform distribution? What is the standard deviation?
A human factors psychologist studied three computer keyboard designs.
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
The combined production level should not exceed 1200 units per month. The demand for product II is no more than half the demand for product I.
In the week before and the week after a holiday, there were 10,000 total deaths, and 4972 of them occurred in the week before the holiday.
Find the probability that a random selected score is between 150 and 157. If a sample of size n = 100 is randomly selected, find the probability that the sample mean will be between 150 and 157.
The summation sign is usually represented by:
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste.
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