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If the mean lifetime of a critical electrical component is 100 hours with a standard deviation of 6 hours, how many of the components must be in stock so that the probability that the average lifetime of the electrical system is at least 105 hours is at most .95?
as shown in your earlier work assuming the systolic blood pressure among women college students is normally distributed
And the manager hopes you help him take a decision of to grant him or not the requested credit, in case you grant it, could it represent a good income
question assume that female students heights are normally distributed with a mean given by micro 64.2 in. and a
In Chapter 4, exercises 4.29, 4.30, 4.31, and 4.32 asked for a data analysis and report. Select one of those analyses, and conduct a goodness-of-fit test for the model you used. Interpret.
What are some examples of fixed costs and variable costs? How can we use that information to find the break-even point in finance?
Let X be the number of kings selected and Y the number of jacks. Find (a) the joint probability distribution of X and Y ; (b) P[(X, Y ) ? A], where A is the region given by {(x, y) | x + y = 2}.
describe the differences between correlations and regressions. can you describe situations where you would use one of
Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to the nearest whole
Explain what you understand by price elasticity of demand. Give examples of inelastic and elastic products or services, discussing how the concept might be used in marketing situations.
The Yerkes-Dodson graph demonstrates that graphs can be used to describe theoretical relations that can be tested. In a study that could be applied.
Still assuming equal variances, test the hypothesis of equal means using Student's t-test and the data in the last problem. Use α = .05.
Classify each random variable as discrete or continuous.- The number of visitors to the Museum of Science in Boston on a randomly selected day.
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