The heights, in cm, of some pupils are:

149 111 171 166

152

129

162

144

a)

find the mean height of the pupils.

b)

find the median height of the pupils.

c)

find the range of the heights of the pupils.

Step-by-step explanation:

Mean = 149 + 111 +171 + 166 + 152 + 129 +162 +144 /8 =1184/8

          =148

Median:

Arrange in ascending order:

111, 129, 144, 149, 152, 162, 166, 171

Median = 149+152/2 = 301/2 = 150.5

Range = 171 - 111 = 60

Mean is finding average. ie  find the sum and divide by the number of items.

Median is the middle number after arranging in ascending or descending order. if no. of items is odd, then median is the middle number. If no. of items is even, then average of the middle two terms.

Range is difference between highest and lowest.

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step-by-step explanation: