Example of standard deviation problem
[DOC File]STATISTICS ─CHAPTER 5 TEST
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34. Each box of 500 light bulbs contains on average seven defective bulbs. The standard deviation of defective light bulbs is: a. 7 b. 2.646 c. 49 d. .4182 . 35. Which of the following is an example of a Poisson experiment? a. Rolling a die 10 times and observing for a number . b.
[DOC File]Practice Problems: Chapter 12, Inventory Management
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Practice Problems: Chapter 12, Inventory Management. Problem 1: ABC Analysis Stock Number Annual $ Volume Percent of Annual $ Volume J24 12,500 46.2 R26 9,000 33.3 L02 3,200 11.8 M12 1,550 5.8 P33 620 2.3 T72 65 0.2 S67 53 0.2 Q47 32 0.1 V20 30 0.1 = 100.0
[DOC File]Coefficient of Variation:
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Standard deviation of closing values for July 1989 2.6 3.77 3.72. For each stock, compute the coefficient of variation. Comment on the results of each stock. Solution: One great thing about this example is that the standard deviation and mean are already calculated for us.
[DOC File]Z-Score Practice Worksheet
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A score of 144 on a test with a mean of 128 and a standard deviation of 34..47. A score of 90 on a test with a mean of 86 and a standard deviation of 18. .22. A score of 18 on a test with a mean of 15 and a standard deviation of 5. .6
[DOC File]One Sample T-Test
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In the analysis below the researcher is looking to find a difference of 4/10 of a standard deviation (i.e., d = .40) using a two-tailed test and α = .05. With a 132 participants per …
[DOC File]JMP Handout #1 - STAT 321
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The variance and standard deviation are 382 and 19.54 respectively. 100(1- ) % CI for the Population Mean Shelf Life has the form: By default JMP gives a 95% CI for the population mean , which in the case of the shelf life study is the interval (117.02 days, 144.98 days).
[DOC File]How to Work Simple Normal Distribution Problems Using the ...
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The a) part is a problem to find an area, and the b) part is a problem to find an x-value: A civil service exam is administered to a new group of 100 job applicants. By past experience the mean for new applicants is 65 and the standard deviation is 10, with an approximately normal distribution.
[DOC File]Comparisons Among Several Samples (Analysis of Variance ...
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For checking whether the equal spread assumption is reasonable (i.e., whether the t-test and ANOVA inferences that assume equal spread will be valid), a rule of thumb is to look at whether the ratio of the largest sample standard deviation to the smallest sample standard deviation is less than two. Here the ratio is 7.77/5.13 = 1.51 < 2.
[DOC File]Practice Problem: Chapter 3, Project Management
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Problem 3: What is the variance in completion time for the critical path found in Problem 2? Problem 4: A project has an expected completion time of 40 weeks and a standard deviation of 5 weeks. It is assumed that the project completion time is normally distributed. (a) What is the probability of finishing the project in 50 weeks or less?
[DOC File]acefinance.weebly.com
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The standard deviation is equal to the square root of the variance: Consequently, the standard deviation for the preceding example would be: In this example, the standard deviation is approximately 11.87 percent. Therefore, you could describe this distribution as having an expected value of 7 percent and a standard deviation of 11.87 percent.
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