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You are interested in determining the average cost of a 3-minute telephone call to locations within the continental U.S. What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call? From the phone company, you have gotten an estimate of = 7.71.
A) 185
B) 445
C) 406
D) 574
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
The amount ($1.00, $5.00, $10.00, $25.00, or $50.00) promised to each person was determined by randomization. For each person who was sent one of the surveys, The value of the X2 test statistic for testing the hypothesis
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What is the probability that the mean price for a sample of 30 service stations is within $.03 of the population mean (to 4 decimals)?
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Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Use the method of least squares to model the relationship between x and y.
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
For value 10,40,20,50 and 40, value of arithmetic mean is? Simplest measure of dispersion is the Standard deviation, variance, Quartile deviation.
If standard deviation is 50 hours and α is equal to 0.01, what values for mean x will result in rejection of null hypothesis.
The Minneapolis Tribune ran an article on gender differences in shopping behavior. When 400 women were asked to respond to the question "Where I shop is influenced by which store has a greater variety," 60% answered "Yes.
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