Question

write the formula for mean by direct method? explain each term in in​

Answer 1

Answer:

Direct method in teaching a language is directly establishing an immediate and audio visual association between experience and expression, words and phrases, idioms and meanings, rules and performances through the teachers' body and mental skills, without any help of the learners' mother tongue.

Step-by-step explanation:

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Answer 2

Arithmetic mean by direct method

Arithmetic mean refers to the average amount in a given group of data. There are many ways to calculate arithmetic mean for grouped data like direct method where all the data are multiplied with their respective frequencies and then added up which are then divided by the summation of the frequencies or number of figures in the data in order to ascertain the mean.

mean = $\frac{ \sum f_i x_i}{\sum f_i}$

where

$\sum f_i x_i$ is the sum of products of frequencies and their respective data

and

$\sum f_i$ is the sum of all the frequencies

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