T-Mobile LTE 3:10 PM 31%) Done Test-#1 (Ch. 1-6 with 40 Questions).docx d. 41.5
ID: 3327432 • Letter: T
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T-Mobile LTE 3:10 PM 31%) Done Test-#1 (Ch. 1-6 with 40 Questions).docx d. 41.5 e. 42.5 9. You're told that the shape of the distribution of burning times for light bulbs is balanced (normally distributed), with a mean burning time of about 500 hours. Therefore you can conclude that the median burn ing time a. equals about 500 hours. b. is more than 500 hours. c. is fewer than 500 hours. d. could be any of the above. 10. When a distribution is skewed, report a. the median. b. both the median and mode. c. both the median and mean. d. the mean. 11. The distribution of annual incomes for U.S. houscholds is positively skewed. If the Census Bureau reports a median annual income of S47,450, this implies that the mean annual income is a. about the same. b. larger c. smaller d. either larger or smaller, but it's impossible to decide on the basis of the available information. NOTE 12. The average college professor is a white male. a. mode b. median C. mcan d. impossible to determine on the basis of available information 13. Among frequency distributions for physical stamina scores, the greatest variability probably would occur in the distribution for a. welltrained athletes. b. patients at a health clinic. c. infants. d. the general population.Explanation / Answer
9 ) a ) equals about 500 hours .
Reason : In a normal distribution , mean = median = mode as the distribution is symmetric .
10 ) a ) the median .
11 ) b ) larger
Reason : In a positively skewed distribution , mean > median > mode .
12 ) d ) impossible to determine on the basis of available information .
13 ) d ) the general population .
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