Find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample d

Question

Find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data. Fourteen different second-year medical students measured the blood pressure of the same person. The systolic readings (in mm-Hg) are listed below. 122 128 146 137 122 134 123 128 140 128 128 143 140 148 (a) The mean blood pressure reading is mmHg. (Round to the nearest tenth as needed) (b) The median blood pressure reading is mmHg. (Round to the nearest tenth as needed.) (c) Select the correct choice below and fill in any answer boxes within your choice. A. The mode blood pressure reading is mmHg (Use a comma to separate answers as needed.) B. There is no mode. (d)The midrange of the data set is mmHg. (Round to the nearest tenth as needed.)

Explanation / Answer

Given observations are

122, 128, 146, 137, 122, 134, 123, 128, 140, 128, 128, 143,140,148

mean = sum of obsns / 14

= 1867/14

=133.3571

There are 14 observations

so median = mean of 7th and 8 th obs

= mean of 128 and 134

= 131

so median =131

128 is most repeated observation

so mode is 128

Range= Maximum obsn - minimum obsn

= 148-122

= 26

Midrange= range/2

= 26/2

= 13

so midrange is 13

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