Chapter 03(2) - CHAPTER THREE DESCRIPTIVE STATISTICS II...

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CHAPTER THREE DESCRIPTIVE STATISTICS II: NUMERICAL METHODS MULTIPLE CHOICE QUESTIONS In the following multiple choice questions, circle the correct answer. 1. A numerical value used as a summary measure for a sample, such as sample mean, is known as a a. population parameter b. sample parameter c. sample statistic d. population mean e. None of the above answers is correct. 2. Since the population size is always larger than the sample size, then the sample statistic a. can never be larger than the population parameter b. can never be equal to the population parameter c. can never be zero d. can never be smaller than the population parameter e. None of the above answers is correct. 3. μ is an example of a a. population parameter b. sample statistic c. population variance d. mode e. None of the above answers is correct. 4. The mean of a sample a. is always equal to the mean of the population b. is always smaller than the mean of the population c. is computed by summing the data values and dividing the sum by (n - 1) d. is computed by summing all the data values and dividing the sum by the number of items e. None of the above answers is correct. 5. When the smallest and largest percentage of items are removed from a data set and the mean is computed, the mean of the remaining data is a. the median b. the mode c. the trimmed mean d. any of the above e. None of the above answers is correct. 6. In a five number summary, which of the following is not used for data summarization? 1
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a. the smallest value b. the largest value c. the median d. the 25th percentile e. the mean 7. Since the mode is the most frequently occurring data value, it a. can never be larger than the mean b. is always larger than the median c. is always larger than the mean d. must have a value of at least two e. None of the above answers is correct. Exhibit 3-1 The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0 - 9 40 10 - 19 50 20 - 29 70 30 - 39 40 8. Refer to Exhibit 3-1. The class width for this distribution a. is 9 b. is 10 c. is 11 d. varies from class to class e. None of the above answers is correct. 9. Refer to Exhibit 3-1. The number of students working 19 hours or less a. is 40 b. is 50 c. is 90 d. cannot be determined without the original data e. None of the above answers is correct. 10. Refer to Exhibit 3-1. The relative frequency of students working 9 hours or less a. is .2 b. is .45 c. is 40 d. cannot be determined from the information given e. None of the above answers is correct. 11. Refer to Exhibit 3-1. The cumulative relative frequency for the class of 10 - 19 a. is 90 b. is .25 c. is .45 d. cannot be determined from the information given 2
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e. None of the above answers is correct. 12.
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Chapter 03(2) - CHAPTER THREE DESCRIPTIVE STATISTICS II...

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