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2.(13 points) (Cough, cough:) The following table presents the number of days a sample of patients repoted a cough lasting from an acute cough illness.

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2.(13 points) (Cough, cough:) The following table presents the number of days a sample of patients repoted a cough lasting from an acute cough illness. 16 20 21 20 19 17 18 12 22 17 16 24 15 13 21 16 21 20 20 19 18 16 19 20 21 21 14 16 16 14 17 18 15 14 20 20 13 15 18 20 19 21 19 18 20 a. Construct a relative frequency distribution table.(5 classes and class width is 3) (5 points) b. Construct a relative frequency histogram.(3 points) c. Which shape best describes the following histogram?(2 points) (i) Skewed left (negatively skewed) (ii) Skewed right (positively skewed) (iii) Symmetric d. Which of the following is true about the value of the mean compared to the median for the given histogram?(2 points) (i) The mean is greater than the median. (ii) The mean is less than the median. (iii) The mean is equal to the median. e. Find the percentage of patients who cough at least 21 days.(1 points)

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