A large furniture retailer wants to conduct a customer satisfaction survey. Customers are divided into groups based on the amount of money they have spent at the retailer's stores in the past year: less than $2000, from ...
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1. Choose all probability distributions which are theoretically related to normal probability distribution 2. The 68-95-99.7 rule states that in a normal distribution 3. For a normal distribution the a mean of 179 and st ...
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A sample of 100 randomly selected students found that the proportion of students planning to travel home for Thanksgiving is 0.68. What is the Standard Deviation of the sampling distribution?
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A carnival game involves a spinner that is designed so that in 20 percent of spins the player will win a prize. A random sample of 100 spins will be observed and the random variable X = number of times in the sample that ...
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A sample of 184 randomly selected students, found that the proportion of students planning to travel home for Thanksgiving is 0.69. What is the standard deviation of the sampling deviation?
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The time to complete 1 construction project for company A is exponentially distributed with a mean of 1 year. Therefore: (a) What is the probability that a project will be finished in one and half years? (b) What is the ...
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Assume a firm has $45 million in operating profit. The firm's tax rate is 40%. What is the tax shield of the firm's $38 million in debt that charges a 10% interest rate?
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Imagine that I had two drugs, X and Z. I administered the drugs to people with sleep difficulties for one month. The mean amount of sleep difficulties reported in the drug X group in the past month was 3.44 (SD = 2.34) a ...
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A study was conducted to evaluate the association between benzene exposure and leukemia. Employment records identified 10,000 workers who were occupationally exposed to benzene in the 1980s and 14,000 workers who were no ...
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Assume that the mean score on a normally distributed statistics quiz taken by 400 psychology students was 76, and the standard deviation was 8. Ben had a z-score of -1.2. If someone gave a passing grade only to the top 2 ...
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