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In article from the Journal of Management, Joseph Martocchio studied the estimated costs of employee absences. Based on a sample of 176 employees, Martocchio estimated that the mean time of paid time lost during a three month period was 1.4 days per employee with a standard deviation of 1.3...
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3) A researcher want to take a simple random sample of about 5% of the student body at each of two schools. The university has approximately 20,000 students, and the college has about 5000 students. Identify each of the following as true or false justify your answer. a. The sampling...
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for a data set with a mean of 100 and a standard deviation of 5, what interval is guaranteed to contain at least 88.89% of the data set
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4) A random sample size 36 is to be selected from a population that has a mean = 50 and a standard deviation of 10. a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. b. Find the mean of this sampling...
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5) The amount of fill (weight of contents) put into a glass jar of spaghetti sauce is normally distributed with a mean = 850 grams and a standard deviation = 8 grams. a. Describe the distribution of x, the amount of fill per jar. b. Find the probability that one jar selected as...
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A jury selection room has 10 women and 15 men to choose from. What is the probability that in a jury of 12 people, exactly 3 of them would be female? Do not put commas in your answer. Express your answer to the nearest thousandth.
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Determine whether the given value is a statistic or a parameter. 2) After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of...
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What is the probability of choosing a king on the 2nd draw if the first was a king (without replacement)?
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1. 24 golfers will partake in a tournament. (a) Four golfers will be selected to tee off first. In how many ways can this be done? (b) Four more golfers will be selected to tee off next. In how many ways can this be done? (c) This pattern will continue until all 24 golfers...
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What is the probability of choosing a king on the 2nd draw if the first was a king (without replacement)?
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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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