Question

plz answer these 3 questions plz then i will mark u as brainlist

Answer 1

we know that mean = sum of terms/units ÷ no.of units

1) mean enrollment of the school for the period

=1555 + 1670 + 1750 + 2013 + 2540 +2820/6
=12348/6
=2058

we know that range= highest value - lowest value

2) (i) highest is 20.5 on friday..lowest is 0 on monday and thursday
so range = 20.5 - 0 =20.5

(ii) mean of the rainfall
=0 + 12.2 + 2.1 + 0 + 20.5 + 5.5 + 1 /7
=41.3/7
=5.9

(iii)no .of times rainfall is lower than mean(i.e, 5.9) is on monday(0)

wednesday ( 2.1)

thursday (0)

friday (5.5)

saturday (1)


3)

(i) height of the tallest Girl is 151

(ii) height of the shortest Girl is 128

(iii) range of data= h highest - lowest
=151 - 128 = 23

(iv) mean height of girls
= 135 + 150 + 139 + 128 + 151 + 132 + 146 + 149 + 143 + 141 / 10
= 1414/10
=141.4

(v) girls who have more height that the mean(141.4) are 150,151,146,149,143