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A coin-operated drink machine was designed to discharge a mean of 6 ounces of coffee per cup. Suppose that we want to carry out a hypothesis test to see if the true mean discharge differs from 6. State the null hypothesis and the alternative hypothesis that we would use for this test.
the average return for large-cap domestic stock funds over the three years 2009-2011 was 14.8. assume the three-year
A pair of dice is rolled. The sum of the faces on top is observed. What are the expectation, variance, and standard deviation of the observed sum? The Expectation and Variance Template attached to the main posting is optional and recommended.
Digital Switches, Inc., produces a product called the C3PO with an advertised 0.5% failure rate. Calculate the range within which the population average failure rate can be found with 95% confidence.
Describe to a person who has never taken a course in statistics the meaning of a grouped frequency table.
1. Develop the correlation matrix showing the correlation between all possible pairs of variables. Test statistically to determine which independent variables are significantly correlated with the dependent variable, book sales. Use a significance..
What will the yearly income be if, instead of a straight life annuity, he purchases a life annuity with a 10-year guaranteed period?
Calculate 95 percent and 99 percent confidence intervals for m. Using the 95 percent confidence interval, can we be 95 confident that m is at least 50 pounds? Explain.
The average cost of a renting a compact size car in a major metropolitan area is R51.74 with a standard deviation of 7.48. Assume a normal distribution.
Draw a ball from number 1: if red go to number 2; if black go to number 3. What is probability
Conduct a matched pairs t-test to see if the differences in locations is significant - The air in poultry-processing plants often contains fungus spores.
The insect then chooses one of the two branches. Suppose that 45 of 75 insects choose the pheromone branch. The 95% large-sample confidence interval for the proportion of the population that prefers the pheromone branch is:
A recent study stated that if a person chewed gum, the average number of sticks of gum he or she chewed daily was 8. To test the claim, a researcher selected a random sample of 36 gum chewers and found the mean number of sticks of gum chewed per d..
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