Question

PLEASE DO IT.....IT'S URGENT ​

Answer 1

Step-by-step explanation:

mean=sum of all observations/total no of observation

mean=357/5

mean=71.4kg

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hope it help you

Answer 2

Answer:

mean weight = n1× w1 +n2×w2+ .......nn×wn/n1+n2+.....nn

mean weight=67×4+70×3+72×2+73×2+75×1/4+3+2+2+1

=268+210+144+146+75/12

mean weight = 843/12

mean weight = 70.25

i hope it will help u