Question

8. In a perfectly symmetrical distribution a) the range equals the interquartile range. b) the interquartile range equals the arithmetic mean. c) the median equals the arithmetic mean. d) the variance equals the standard deviation 9. According to the empirical rule, if the data forma "bell-shaped" normal distribution, perce of the observations will be contained within 2 standard deviations around the arithmetic mean.. 68.26 88.89 93.75 a) 95.44 10. Which of the following is NOT sensitive to extreme values? A The range. b) The standard deviation. c) The interquartile range. d The coefficient of variation 11. A clothing store uses comment cards to get feedback from its customers about a newly added items. It recently introduced plus size fashion wear. Customers who purchased the items were as fill out an outline comment survey giving 10 % off the next purchase. The data summarized in the below. Which of the following would be an appropriate method for displaying the data shown in table. Response Frequency Very satisfied Satisfied Less than fully satisfied 12 Not satisfies a) contingency table b) bar chart c) pie chart d) both b) nd c) e) both a) and c)

Answer 1

8) In a perfectly symmetrical distribution c) The median equals to the arithmetic mean. b) Acording to empirical sule around & 95.44 percent of the obsn will contained within 2 stemdard deviations around the mean 10) c) Interquastile range is not sensitive to extreme values. for 11) The bar chast is an appropriate method desplaying the data shown in reble