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According to an exit poll taken by CNN during the 2008 Democratic Primary in Connecticut, 552 registered voters voted for Hilary Clinton and 598 for Barack Obama. Would you have been willing to predict Obama as the winner?
No, z = 1.36Yes, z =1.36Yes, 0.52 > 0.50No, z ≈ 0No, the sample size is too small to make inferences about the population
What is the minimum sample size required to assure that your sample proportion "p" will be within the required margin of error around the population proportion "p". Use the traditional methods for testing hypotheses and show the results of all ste..
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
Perform a linear regression, 8 month moving average & 3 month moving average forecasting technique to see which is most accurate for the new quarter 11 if quarter 11 sales are 172,000 units
A person runs one mile to his house as fast as he can. It is equally likely that he will run at an average speed of 3 miles per hour, 6 miles per hour, and 9 miles per hour.
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
Test the overall significance of the regression model at α = .05 level. Please use the six-step hypothesis-testing framework we employed in class, and write out the last three steps in this table:
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
Is there reason to believe there is a positive linear correlation between the number of t.v. commercials and the sale of this product?
What sample size would be required to obtain the error of ±10 square millimeters with 99 percent confidence?
Recall that the trash bag manufacturer has concluded that its new 30 gallon bag will be the strongest such bag on the market if its mean breaking strength is at least 50 pounds.
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
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