Stats Help for College-level Students

Decision making with probabilities

Dollar Department Stores has received an offer from Harris Diamonds to purchase Dollar’s store on Grove Street for $120,000. Dollar has determined probability estimates of the store's future profitability, based on economic outcomes, as: P($80,000) = .2, P($100,000) = .3, P($120,000) = .1, and P($140,000) = .4. ...continues

Which test to use and why is it best?

I received three data sets (the data here are fictional to preserve confidentiality, but the point is the same): In 1998, a group of companies sold 1,000 units of Product A, 500 of B, 200 of C etc, for a total of 2000 units sold for ALL 8 of a set of 8 products. In 1999, the numbers were 900 for A, 400 for B, 300 for C etc, for ...continues

p-chart control chart using phstat

out of the problem, i have done b) and c). I need help with a). I am having a hard time drawing out a p- control chart using PHstat. If you dont have phstat, you can download it for free here: http://www.sunflowerlabs.com/phstat DATA FILE IS ATTACHED so you dont have to retype it.

goal programming in EXCEL

Please answer questions in DETAIL and the rationale for choosing them. Even if you have answers to ONLY the first TWO question, its ok. Send it over ASAP. =================================== See attachment =================================== You have now become an expert in the use of goal and integer programming. Consider ...continues

Binary integer programming model (capital budgeting)

a. Define the decision variables for this formulation. b. Show the binary integer programming formulation including the objective function and all relevant constraints. c. Solve the problem as a binary integer programming model on a spreadsheet, or in LINDO. d. Interpret this solution to management in its language.

Comparisons Involving Proportions and a Test of Independence

Does age make a difference in the amount of savings a worker feels is needed to be secure at retirement? A study by CommSciences for Transamerica Asset Management found that 0.24 of workers in the 25-33 age category feel that $250,000 to $500,000 is enough to be secure at retirement. In the 34-52 age category already 0.35 ...continues

Regression

a. Fit a logistic regression model to predict the probability of successful completion of the MBA program based on undergraduate grade point average and GMAT score. b. Explain the meaning of the regression coefficients for the model fit in (a). c. Predict the probability of successful completion of the program for a student ...continues

Regression

4. Fit to the data a quadratic polynomial model. Test your model for adequacy of fit and for appropriateness. 5. In which of the four quarters does the seasonal component reach its peak? In which does it reach its trough? Explain.

Testing a hypothesis.

A Baker says they can make a cake in 60 minutes from scratch, which I do not think he can. After watching them 18 times I come up with the Mean time of 65.37 minutes with a standard deviation of 8.2 minutes Using the Student's t Distribution because I have a small sample, I'll let my null hypothesis be: Ho: m = 60 and ...continues

Calculating the mean and standard deviation from the given situation.

Find the mean and standard deviation for the random variable x, the number of defects per pack produced, if 20 packs of digits are produced, with a 3% rate of defects.