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Unformatted text preview: Ajman University of Science & Technology Network Ajman Campus Faculty of University Requirements & Counseling Basic Science Unit 2010 / 2011 1 Circle the most accurate answer for each of the following : Consider the following sample of values for a random variable X: 12 15 11 25 40 25 12 20 1. The sample size is: a 20 b 8 c 6.0 d 7 2. The range is : a 15 b 29 c 17.5 d 40 3. The mean is : a 20 b 15 c 17.5 d 160 4. The median is : a 17.5 b 37.5 c 15 d 20 5. The mode is : a 12 & 25 b 15 c 12 d 40 6. A discrete variable is A) Cannot be negative B) An example of a qualitative variable C) Can assume only whole number values D) Can assume only certain clearly separated values 7. The difference between a histogram and a frequency polygon is A) The frequency polygon is reported as a percent. B) The histogram employs bars whereas the midpoints are connected for a frequency polygon C) Bars cannot be adjacent in a histogram. D) Openended classes can be accommodated with a frequency polygon. 8. The difference between a histogram and a bar chart is: A) The midpoints are connected with a histogram but not with a bar chart. B) The bars must be next to each other on a histogram and separated in a bar chart. C) Cumulative frequencies are required in a bar chart. D) None of the above. 9. A disadvantage of the range is A) Only two values are used in its calculation B) It is in different units than the mean C) It does not exist for some data set D) All of above 10. The ratio scale of measurement A) Usually involves ranking B) Cannot assume negative values. C) Has a meaningful zero point D) Is usually based on counting 11. The mean deviation is A) Based on squared deviations from the mean B) Also called the variance C) Based on absolute deviations values D) Always reported in squared units 12. For Quantitative data, which of the following measurements can be calculated: A) Arithmetic mean B) Range C) Mode D) All above 13. For Qualitative data, which of the following measurements can be calculated: A) Arithmetic mean B) Range C) Mode D) A and B 2 14. For Qualitative data, which of the following measurements can not be calculated: A) Arithmetic mean B) Range C) Mode D) A and B 15. If the mean of the following set of data 11, 8, k, 10 is 9. The value of k is A) 10 B) 7. C) D) Needs more information 16. The total deviation from the mean of the following data 12345678, 3345234, 20005, 32, 50000005, 0, 10 is A) 1. B) Cannot be calculated. C) Zero. D) 7. 17. The total deviation from the mean of the following data 12 , 3 , 20005 , 32 , 55 , 0 , 10 is A) 1. B) Cannot be calculated. C) Zero. D) 7. 18. In a negatively skewed distribution which of the measures of central tendency is the largest A) Median B) Mode C) Can not tell D) Mean 19. In a positively skewed distribution which of the measures of central tendency is the largest A) Mean B) Median C) Mode D) Cannot tell from the given information 20. In a symmetric distribution A) The mean, median, and mode are equal.The mean, median, and mode are equal....
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 Spring '12
 johnanderson
 Statistics, Standard Deviation, Mean, B. C.

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