Question

Write the formula for mean deviation of grouped data about mean

Answer 1

Mean by step deviation method:

Please se the attachment.

Hope it helps

Answer 2

Answer:

The correct answer is :  $MD = \frac{\sum f |x - \bar{x}|}{\sum f}$

Step-by-step explanation:

The formula for mean deviation of grouped data about mean is:

$MD = \frac{\sum f |x - \bar{x}|}{\sum f}$

Where:

$MD$ = Mean deviation

$\sum$ = Summation

$f$= Frequency

$x$ = Class midpoint

$\bar{x}$ = Mean of the data set. It is calculated by dividing the sum of all the class midpoint values by the total frequency.

In this formula, we first find the difference between each class midpoint and the mean of the data set. We then take the absolute value of each difference, since we are interested in the deviation regardless of whether it is positive or negative. Next, we multiply each  absolute deviation by its corresponding frequency. Finally, we sum all the weighted absolute deviations and divide by the total frequency to get the mean deviation of the grouped data about the mean.

To learn more about deviation, visit:

https://brainly.in/question/1741227

To learn more about mean deviation, visit:

https://brainly.in/question/9675086

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