Physicians use pulse rate to assess the health of patients. A pulse rate that is abnormally high or low suggests that there might be some medical issues. For example, a pulse rate that is too high might indicate that the patient has an infection or is dehydrated. Consider pulse rate measurements (in beats per minute) obtained from a simple random sample of 40 males and another simple random sample of 40 females as shown in Table 1.
a) Prepare a frequency distribution table for the pulse rates of males and females separately. Take 10 as a class width for both distributions and 50 as a lower limit of the first class for the males; 60 as a lower limit of the first class for the females.
b) Prepare a histogram for each of the pulse rates distribution. Describe the shape of each distribution.
c) Draw a cumulative frequency polygon for each of the pulse rates distribution.
From your graph in (b), estimate the median.
[Total: 15 marks]
QUESTION 2
a) From the data in Table 1, for each of the pulse rate distribution, calculate the following:
i. mean
ii. mode
iii. median
iv. standard deviation
b) Determine the value of Pearson’s Coefficient of Skewness (PCS) for each distribution. Comment on the skewness of the data.
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2012-03-02T07:23:43-0500
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