finalb-3700.s98

# finalb-3700.s98 - MSCI 3700 Final Exam - B Name _ Spalding...

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MSCI 3700 Final Exam - B Name _____________________________ Spalding Spring 1998 1. Chapter 2 focused on statistical graphs. Of the following five statements related to this material, four are false and one is correct. Which one is correct? A. A frequency polygon begins at zero on the vertical axis and increases to one on the vertical axis in a non-decreasing manner. B. When constructing a frequency distribution, a general rule is: The more data you have, the more classes you should use. C. Bar charts are especially useful for ratio data. D. Usually an ogive will increase for awhile, hit a peak, and then gradually decrease down to zero. E. You can reproduce the sample data from a histogram (unlike when using a stem-and-leaf diagram). 2. In hypothesis testing, four of the following statements are false and one is true. Which statement is true? A. A “small” p-value leads to the rejection of the null hypothesis. B. To find the p-value for a two-tailed test, you should first double the value of the test statistic. C. If you think that the stated value of a population mean is too small, a one-tailed test of hypothesis is appropriate. D. When using a small sample, it is necessary to assume that the population of interest follows a t distribution. E. When testing H 0 : μ = 10 versus H a : μ ≠ 10 using a significance level of .05, you can reject H 0 if 10 does lie in the 95% confidence interval for the population mean. 3. Someone approaches you with a concern that the variation of a critical measurement is too large for a certain manufactured part produced by your company. If you were to carry out a test of hypothesis here, what test would be appropriate? A. A two-tailed test on μ. D. A two-tailed test on μ. B. A two-tailed test on σ. E. A one-tailed test on σ. C. Unable to determine until sample data has been obtained. 4. Which one of the following statements regarding the Central Limit Theorem is true? A. The distribution of sample means follows an approximate normal curve (distribution) for large sample sizes. B. A population will be approximately normally distributed if you take a large sample from it. C. Sample means using samples of size 36, obtained from a population with mean 24 and standard deviation 6, will follow an approximate normal curve with mean 4 and standard deviation 6. D. Sample means using samples of size 36, obtained from a population with mean 24 and standard deviation 6, will follow an approximate normal curve with mean 24 and standard deviation 6. E. The distribution of sample means follows an approximate normal curve (distribution) for any sample size.

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Problems 5 - 9 use the following information . Hourly temperatures were recorded at 12 different one-hour intervals on a particular day in Houston. The recorded temperatures in the sample are 95, 96, 92, 91, 87, 83, 82, 81, 83, 89, 93, 95 5. The average recorded temperature is A. 87.92 B. 88.92 C. 89.92 D. 85.92 E. 86.92 6. The standard deviation of the 12 temperatures is A. 9.55
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## This note was uploaded on 03/09/2011 for the course DSCI 2710 taught by Professor Hossain during the Spring '08 term at North Texas.

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finalb-3700.s98 - MSCI 3700 Final Exam - B Name _ Spalding...

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