Question

Write formula for direct method to find the mean

Answer 1

Answer:

Arithmetic Mean by Direct Method - formula

∑i=1nfixi= Sum of the product of frequencies and corresponding observations.

Answer 2

Answer:

Arithmetic Mean by Direct Method - formula

∑i=1nf= Sum of all the frequencies. This is also denoted by N. ∑i=1nfixi= Sum of the product of frequencies and corresponding observations.

Step-by-step explanation:

= incorrect ∑x – the wrong value + correct value. = 1660 – 160 + 150 = 1650. Hence, the correct A.M. = 1650 / 10. = 165 cm. Hence the correct mean height is 165 cm.