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A machine used to fill gallon-sized paint cans is regulated so that amount of paint dispensed has a mean of 128 ounces and a standard deviation of 0.20 ounces. You randomly select 40 cans and carefully measure the contents. The sample mean of the cans is 127.9 ounces. Does the machine need to be reset? Explain your reasoning.
What is the role of theory in research proposals? What are the elements of a study plan? Where might a beginning researcher lose logical flow among elements in a study plan? Why might that happen?
Speaking to a group of analysts in January 2006, a brokerage firm executive claimed that at least 70% of investors are currently confident of meeting their investment objectives.
In a market study for Target, a researcher found that 70% of customers are repeat customers. If 14 customers are selected at random, find the probability of getting.
Microfracture knee surgery has a 75% chance of success on patients with degenerative knees. The surgery is performed on 5 patients. Find the probability of the surgery being successful on less than 3.
T-scores are used on some psychological tests, such as the MMPI. T-scores have a mean of 50 and a standard deviation of 10, and therefore a z-score of -1 (one standard deviation below the mean) would be converted to a T-score of 40.
Locate value of the population mean in your sketch and make an estimate of the standard deviation
Find out the following: Mean swipe rate, Standard deviation of the swipe rate.
Height of men have a mean of 69.6 inches and standard Dev of 2.8 inches. If 64 men are randomly seleted, find the probabilty that they have a mean greater than 70.6 inches.
Determine the expected number of Republicans who will win office in the coming election? Illustrate the standard deviation of r?
A discussion of extreme weather reports that: "In most states, hurricanes occur infrequently. Yet, when a hurricane hits, the losses can be catastrophic.
To find the probability values in case of raw data, binomial, normal
find the percentage of such males that weigh between 190 and 210 lb. (Note: Make sure you choose the flag value closest to 190 and 210.) Give the proportion as a decimal rounded to thousandths.
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