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.

a: 1/6, j: 1/4

step-by-step explanation: you are welcome

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: