The heights of 7 students(in cm) are given as: 120,126,132.4,121.5,120.3,132,125. Find the mean and median for the data
Answers
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Find the mean and median for the data.
Step-by-step explanation:
Given data = 120, 126, 132.4, 121.5, 120.3, 132, 125.
Total number of data = 7
The mean formula = Sum of All Data Points / Number of Data Points.
Mean = 120 +126+ 132.4 + 121.5 + 120.3 + 132 + 125 / 7
= 877.2 / 7
=125.31
Therefore, the mean height of 7 students is 125.3 cm.
If the total number of observations (n) is an odd number, then the formula for the median is:
Median = (n + 1 / 2)th observation
To find the median, we have to rewrite the data in numerical order.
120, 120.3, 121. 5, 125, 126, 132, 132.4
Median = (n + 1 / 2)th observation
= (7+1) / 2
= 8/ 2
= 4th observation
In the sequence, the 4th observation is 125.
Therefore, the median value is 125.