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Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.
Sales: 191, 135, 146, 165, 136, 142Audit: 130, 102, 129, 143, 149, 120, 139
At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?
What is the probability the selected employee is a production worker? What is the probability the selected employee is either a production worker or a supervisor?
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
Do these data suggest a statistically significance difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance and computed value of 2.37.
Wwho are also athletes but who are not regularly hit in the head. Is this an example of an experimental or nonexperimental study?
A new product has the following profit projections, associated probabilities, and indifference probability:
A normal tomato will gain an average of 2 ounces per week during the growing season. A sample of 100 tomatoes is given a special hormone to increase their growth.
Once R is selected, the sum is compounded instantaneously for a year so that X= 50000 e^R dollars is the amount at the end of that year. Find the distribution function and the p.d.f. of X.
You are the quality control manager at Mars, Inc and you want to prove the company's claim that 10% of all M & M candies are blue. Is it possible to prove that claim using methods of hypothesis testing? Why or Why not?
How should he go about taking samples to gather data for testing the hypotheses?
At the .01 level of significance, is the true mean greater than 10?
Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of 0.02 grams with 90 percent confidence?
A researcher estimates an AR(1) model with an intercept and finds that the OLS estimate of Beta1 is 0.95, with a standard error of 0.002.
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