Q7. The following are the findings of measuring the heights (in cm) of 11 students of class 7: 130, 132, 125, 127, 141, 139, 150, 135, 147. 138. 133 .
(a) What is the mean of the data of heights of the students and how many students have height more than the mean height?
(b) What is the median height?
Answers
Answer:
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Step-by-step explanation:
a) total heights = 130+132+125+141+139+150+135+147+138+133=1370
To find the mean, we find the sum of observation and divide it by the number of observation.
therefore in this case, mean = 1370÷11= 124
in this case all the 11 students have more than the mean hight
b) we arrange the following data in the accnding order, we get =125 ,127 ,130 ,132 ,133 ,135 ,138 ,139 ,141 ,147 ,150 Median is the middle observation. therefore the 139 is the meadian.