Questions 17 to 20 are based on the table below The table describes the degree of front to back sway in two groups of subjects asked to stand motionless Elderly subjects ( 70 years of age) and Young subjects ( 50 years of age) Sway is measured in degrees motion from vertical (0 degrees) Group Statistic Value Std Error Elderly Mean 26 33 N 9 Median 24 00 Variance 95 50 Std 9 77 Deviation Minimum 19 00 Maximum 50 00 Interquartile 10 00 Range Skewness 2 09 72 Young Mean 18 13 1 44 N 8 Median 17 00 Variance 16 70 Std 4 09 Deviation Minimum 14 00 Maximum 25 00 Interquartile 7 50 Range Skewness 65 75 F2 ED F3 000 F4 3 E $ 4 95 F5 6 F6 F7 17 114 8 R T Y U F8 9 F9 F10 0 0 P Question 19 (1 point) Based on the statistics above, which one of the following statements is NOT true Some elderly subjects sway a lot front to back On average elderly subjects have greater degree of sway than young subjects The maximum sway among the elderly subjects is twice as much the maximum sway among the young subjects The variability among young subjects is bigger than among elderly Question 20 (1 point) The unit of standard deviation in this example is Degree The square root of degree The square of degree Standard deviation doesn't have a unit Question 17 (1 point) Based on that statistics above, what one of the following best describe the shape of the distribution of the front to back sway in the elderly group Positively skewed Negatively skewed Symmetric Unable to determine Question 18 (1 point) What is the standard error of the mean among elderly 9 77 F2 1 44 3 26 95 50 Question 19 (1 point) 3 F3 54 000 000 F4 F5 E R 55 6 F6 F7 F8 17 44 F9 F10 8 9 0

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Questions 17 to 20 are based on the table below. The table describes the degree of front to back sway in two groups of

Questions 17 to 20 are based on the table below. The table describes the degree of front to back sway in two groups of subjects asked to stand motionless: Elderly subjects (> 70 years of age) and Young subjects (

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