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0871 e 0340 1 148 chapter 01 an introduction to

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Unformatted text preview: of the course was "poor". What proportion of students who think that their textbook was "hard" also thought their course was "poor". A. 0.588 B. 0.155 C. 0.091 D. 0.251 E. 0.616 1-150 Chapter 01 - An Introduction to Business Statistics 117. 550 students answered a question with the following results based on their rating of their instructor: What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class? A. 0.345 B. 0.254 C. 0.482 D. 0.898 E. 0.644 118. A measurement located outside the outer fences of a box-and-whisker display is _____. A. always in the first quartile B. an outlier C. always the largest value in the data set D. within the inner fence 119. Another name for the 50th percentile is the _____. A. Mean B. First quartile C. Median D. Mode E. Third quartile 1-151 Chapter 01 - An Introduction to Business Statistics 120. The measurement in a sample or a population that occurs most frequently is the _____. A. Mode B. Mean C. Median D. Outlier E. Average 121. The average of the squared deviations of the individual population measurement from the population mean is the _____. A. Standard deviation B. Mean C. Variance D. Median E. Range 122. A(n) _____ process is able to consistently produce outputs that meet specifications. A. in control B. capable C. normal D. statistically average E. constant 123. The difference between the largest and smallest measurements in a population or sample is the _____. A. Mean B. Median C. Range D. Variance E. Standard deviation 1-152 Chapter 01 - An Introduction to Business Statistics 124. If the mean is greater than the median, then the distribution is _____. A. skewed right B. skewed left C. symmetrical D. bi-model 125. The point estimate of the _______________ is the positive square root of the sample variance. A. sample mean B. sample standard deviation C. range D. median E. population standard deviation 126. Getting a process into statistical control does not guarantee that the process is capable of _____. A. Remaining in control B. Having no outliers C. Meeting specifications D. A & C E. none of the above 127. The ____________________ is a quantity that measures the variation of a population or sample relative to its mean. A. Mean B. Standard deviation C. Range D. Coefficient of variation E. Z-score 1-153 Chapter 01 - An Introduction to Business Statistics 128. Compute the population variance of the data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14. A. 21.9 B. 3.87 C. 20.5 D. 17.0 E. 3.625 129. If the median of a data set is 760 and the upper quartile is 950, and the lower quartile is 650, what is the interquartile range? A. 300 B. 190 C. 110 D. 150 E. 910 130. Given a set of data with a mean of 150 and a standard deviation of 20. Using Chebyshev's Theorem, what is the minimum percentage of data between 110 and 190? A. 95.44% B. 93.75% C. 68.26% D. 75.00% E. 98.75% 131. Compute the sample standard deviation of the data set 6,4,2,1,4,1 A. 1.83 B. 2.00 C. 1.41 D. 3.33 E. 4.00 1-154 Chapter 01 - An Introduction to Business Statistics 132. If 50 of 500 sampled customers said they would make a purchase of a new TV set, what is the sample proportion? A. .10 B. .20 C. .15 D. .25 133. Which of these are important properties of any data set? A. outliers B. variation C. shape D. B & C E. none of the above 134. If specifications are (1.6, 1.8), and a 99.73 percent tolerance interval is (1.62, 1.83), is the process capable? A. Yes, always B. Yes, 99.73% of the time C. No 135. The average lateness for one of the top airline companies is 10 minutes. The variance of the lateness measure is calculated as 9. An airplane arrived 13 minutes after the stated arrival time. Calculate the Z-score for this particular airplane's lateness. A. 0.33 B. 0.58 C. 1.33 D. 0.44 E. 1.00 1-155 Chapter 01 - An Introduction to Business Statistics 136. The average life of Canadian women is 73.75 years and the standard deviation of the women's life expectancy in Canada is 6.5 years. Using the Chebyshev's theorem, determine the minimum percentage of women in Canada whose life expectancy is between 64 and 83.5 years. A. 93.17% B. 68.26% C. 55.56% D. 88.89% E. 33.33% 137. The average life of Canadian women is 73.75 years and the standard deviation of the women's life expectancy in Canada is 6.5 years. Based on Chebyshev's inequality determine the upper and lower bounds on the average life expectancy of the Canadian women such that at least 90% of all population is included. A. [12.09 135.41] B. [8.75 138.75] C. [53.20 94.30] D. [66.38 81.13] E. [67.25 80.25 138. The following table shows the Price-to-Earnings ratio for a Stereo equipment manufacturing company between 1998 and 2002. Determine the percentage change in the P/E ratios from 1998 to 1999. A. 15.07% B. 17.74% C. 20.72% D. -17.74% E. -15.07% 1-156 Chapter 01 - An Introduction to Business Statistics 139. The following table shows the Price-to-Earn...
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