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Assume that a study is performed and in this study, subjects are asked to maintain eye contact with another individual for as long as possible. The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds.
What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants is randomly selected
Derive rules to test whether a number is divisible by N, where N ranges from 2 to 13. E.g. A number is divisible by 3 if the sum of the digits is divisible by 3.
Let X be the number obtained on the blue die minus the number obtained on the red die. Draw a histogram for its probability function and a graph for its distribution function.
What statistic (mean, median or mode) would you use to describe each aspect of the "typical" home? For example, you might use the MEAN for price, the MEDIAN for square footage.
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
Infer that the difference in the level of satisfaction with service between the two branches.
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
Explain the purpose of the chi-square test for independence. Provide some practical examples where this test might be used in business.
Suppose that you draw a random sample of 27 cans. Find the probability that the mean weight of the sample is less than 6.19 ounces.
Perform a contingency analysis on the data to determine if there is any dependency between the number of level of education attained by the father and the size of his family.
What about floor and ceiling effects? How can these issues preclude a significant correlation coefficient from being discovered?
You are conducting a study for which it is critical that the findings be representative of the population of interest. Which of the following research methods runs the greatest risk.
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