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Point is uniformly distributed in the unit sphere in three dimensions. a) Determine the marginal densities of the x, y, and z coordinates. Determine the joint density of x and y coordinates.
A random sample of 36 drinks from a soft drink machine has an average content 7.6 ounces with an standard deviation of 0.48 ounces. Test the hypothesis ounces against the alternative hypothesis at the 0.05 level of significance.
If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50, construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under.
Determine the probability that no more than 10 firms are perfectly competitive?
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
Is this a proper probability density function? How do you know? Find the mean, variance, and standard deviation of x, showing your work.
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
f x has a normal distribution with mean µ=15 and standard deviation σ= 3, describe the distribution of x values for sample size n, where n = 4, n = 16, and n = 100. How do the x distributions compare for the various sample sizes?
Critically discuss the characteristics of integer programming problems. Provide specific instances in which you would use an integer programming model rather than an LP model. Provide real-world examples.
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
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