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Dear Course Hero Tutoring: The attached includes a 25 questions related to Statistics and Probability. I know that you just answer three questions a day. So the deadline is April 30, 2011. So you can answer 6 questions every week or so. Take your time to answer them and reply back to me if...
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The life expectancy of Timely brand watches is normally distributed with a mean of four years and a standard deviation of eight months. a)What is the probability that a randomly selected watch will be in working condition for more than five years? b. The company has a three-year...
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The amount of money spent by a customer at a discount store has a mean of $100 and a standard deviation of $30. What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5700? (Hint: The total will be more than $5700 when the sample average exceeds...
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if an apple is hanging from a string and 3 flies land on it, whats the probability that all 3 are on points that are within the same hemisphere
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Basketball Fans: Fifty-four percent of men consider themselves basketball fans. You randomly select 10 men and ask each if he considers himself a basketball fan. Find the probability that the number who consider themselves basketball fans is a. Exactly eight b. At least eight c....
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Carbon monoxide emissions for a certain kind of cary vary with mean 2.9 gm/mi and standard deviation 0.4 gm/mi. A company has 80 of these cars. Estimate the probability that the mean CO level is between 3.0 and 3.1 gm/mi.
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4 Questions: $40 In a nationwide survey of 1000 companies with more than 50 employees, managers were asked to rank various factors that influence their decisions in hiring employees. Each factor was ranked on a scale of 1 to 10, with 1 being not important and 10 being very important. The...
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Is this correct? Would you please explain briefly? Suppose that the percentage returns for a given year for all stocks listed on the New York Stock Exchange are approximately normally distributed with a mean of 12.4 percent and a standard deviation of 20.6 percent. -----------------...
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With SD= 13, a 90% confidence interval for a population mean was 103 to 106.Determine the sample size.
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
- 2. What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Why is the sequence important?
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