A Pareto chart. A Pictograph. c. An Ogive. b. A Bar Chart. 10. Which of the foll

Question

A Pareto chart. A Pictograph. c. An Ogive. b. A Bar Chart. 10. Which of the following should not be used when extreme values exist in a data set? The median. The mode. a· c. d. The midrange. None of the above. b. 11. Which of the following is NOT true about the mean? a. Half of the observations are not always larger than the mean. b. It is influenced by a large value. c. All the values are used in its calculation. d. It is found by summing half of the values and dividing by the number of observation. 12. Which of the following is NOT true about a z-score (standard score)? a. It is represents the number of units a specific data value is from the mean. b. It is determined by finding the deviation of a data value from the mean then dividing it with the standard deviation. It represents the number of standard deviations a particular data value is from the It is used to locate the relative position of a data value in a data set. c. mean. d. 13. Given the following boxplot below where "m” is the median value, what statement could be made about the distribution of the data? a. The distribution is approximately symmetric. b. The distribution is positively skewed c. The distribution is negatively skewed. d· The data are nominal and consequently cannot be identified as symmetric or skewed. 14. John's raw score on a science test was 89 corresponding to the 75th percentile. This means that a. John answered 75% of the exam questions correctly. b, John did better than 75% ofother test takers. c. John did better than 25% of the other test takers. d. John answered 75 exam questions correctly

Explanation / Answer

10. When extreme values exist in the dataset, we should

not use the mid-range. Hence, Option (c) is the correct choice.

(Ans).

11. The incorrect statement about mean is Option (d). (Ans).

12. z-value is not used to find how many standard deviation

away, that particular value is. Hence, Option (c) is the correct

choice. (Ans).

13. From, box-plot, the distribution is approximately

symmetric. Hence, Option (a) is the correct choice. (Ans).

14. 75-th percentile means 75 test-takers. Hence, Option (b)

is the correct choice. (Ans).

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