Question

we->
29+4=39
=>4 = 30-29
​

Answer 1

Answer:

class interval Mid-point

x

i

Frequency

f

i

f

i

x

i

25-29 27 14 378

30-34 32 22 704

35-39 37 16 592

40-44 42 6 252

45-49 47 5 235

50-54 52 3 156

55-59 57 4 228

Σf

i

=70 Σf

i

x

i

=2545

Mean=

Σf

i

Σf

i

x

i

=

70

2545

=36.36