Question

find the mean of the frequency distribution ​

Answer 1

this is a answer.sorry for understanding

Answer 2

xf=

115*15=1725

125*25=3125

135*4=540

145*6=870

155*40=6200

165*20=3300

now adding up;sum of fx=15760

and adding all the frequencies:sum of f 100

➡FORMULA: mean=sum of xf/sum of f

therefore;mean=

$15760 \div 100 = 157.6$

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