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If a company employs n salespersons, its gross sales in thousands of dollars may be regarded as a random variable having a gamma distribution with α = 80√n and β = 2. If the sales cost is $8,000 per salesperson, how many salespersons should the company employ to maximize the expected profit?
The standard screening test for Down's Syndrome is based on combination of maternal age and the level of serum alpha-fetoprotein. Using this test 80% of Down's syndrome cases can be identified, while 5 % of normals are detected as positive.
in the past year 17 of local businesses have eliminated jobs. if 25 businesses are randomly selected what is the
The mean age at which a US consumer purchases their first car is 20.2 years. The standard deviation is 2.1 years. For a random sample of 50 first-time car buyers, what is the likelihood that the average age for this sample would be over 21 years o..
a) 95% of confidence intervals generated will include the sample mean X. b) 5% of the confidence intervals generated will include the true mean μ
What are the dependent and independent variables in this problem? Explain. Use the least-squares method to find the regression coefficients (show workings). State the simple linear regression equation.
suppose that 67 of the employees of a company participate in the companys medical savings program. let x be the number
What are the differences between PCA, Regressin, Discriminant analysis , (K-means, hierarchicalmethods) and logisic regression(Bases in the goals and Variables (Y and Xi)
Show that if the roots of the polynomial p are all real, then the roots of p' are all real. If, in addition, the roots of p are all simple, then the roots of p' are all simple.
a box contains 11 red balls 5 green balls and 4 black balls. a sample of 8 is to be picked from the box. in how many
Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.
does mean blood pressure differ for seniors who are sedentary a little active and very active? decide what statistical
What might lead minority students to take more or fewer high school math courses? Would these same factors influence success in college?
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