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Question: A large computer company claims that its salaries are normally distributed with mean $50,000 and standard deviation 10,000. What is the probability of observing an income between $40,000 and $60,000?
assume that the number of sick kids in a family is a discrete random variable x with probability function px
Here is a boxplot of Combined Fuel Economy (using an average of driving conditions) in miles per gallon by vehicle Type (car, van, or SUV). Summarize what you see about the fuel economies of the three vehicle types.
discuss what satisfying assumption 1-3 for regression inferences by the variables under consideration would mean. an
the sampling distribution of the sample mean. use the central limit theorem to find the approximate probability that the mean number of flaws exceeds 1.8 per square yard.
Explain in detail how probabilities are used in the situation you chose. What makes probabilities useful in this situation? Do these probabilities affect decision making in this situation? Explain your answer.
Explain whether each of the following would be likely if you were to take a sample of 190 students from the original population.- The mean hours of sleep for the 190 students would be between 8 and 9 hours.
ECON940 - Statistics for Decision Making - Calculate descriptive statistics for the prices of different brands. Comments on the location, shape and variability of those distributions.
Does the sample provide sufficient evidence that the mean pH level in the water differs from 8.5? Conduct a test at the ? = .01 level
A shipment of 150 television sets contains three defective units. In how many ways can a vending company buy three of these units and receive (a) no defective units, (b) one defective unit, and (c) at least two good units?
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
You are being tested for psychic powers. Suppose that you do not have psychic powers. A standard deck of cards is shuffled, and the cards are dealt face down.
How long will a customer expect to wait before being served? Compute the operating characteristics for the drive-through window queuing system.
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