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Unformatted text preview: b. Calculate the sample mean. c. Calculate the sample variance and standard deviation. d. Compare the range and the standard deviation. The range is approximately how many standard deviations? Question 4: The length of time (in months) between the onset of a particular illness and its recurrence was recorded for n = 50 patients: 2.1 4.4 2.7 32.3 9.9 9.0 2.0 6.6 3.9 1.6 14.7 9.6 16.7 7.4 8.2 19.2 6.9 4.3 3.3 1.2 4.1 18.4 0.2 6.1 13.5 7.4 0.2 8.3 0.3 1.3 14.1 1.0 2.4 2.4 18.0 8.7 24.0 1.4 8.2 5.8 1.6 3.5 11.4 18.0 26.7 3.7 12.6 23.1 5.6 0.4 a. Construct a split stemplot (a stemandleaf plot which divides each stem into two parts) using the “tens digit” as the stem and the “ones digit” as the leaf. b. Would you describe the shape as roughly symmetric, skewed right (skewed with a long right tail), or skewed left (skewed with a long left tail)? c. Give the fraction of recurrence times less than or equal to 10 months. 2...
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This note was uploaded on 12/22/2010 for the course MATH Math 1131 taught by Professor Wong during the Fall '10 term at York University.
 Fall '10
 Wong
 Math

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