Question

How to find the mean median and mode for grouped data?

Answer 1

Answer:

• To calculate the mean of grouped data, the first step is to determine the midpoint (class mark) of each interval, or class. These midpoints must be then multiplied by the frequencies of the corresponding classes.

• This formula: m = l+ [n/2 - cf/f ] × h

means lower boundary.

of the median class 'n' means sum of frequencies, 'F' means frequency of the lower limit and CF means Cumulative frequency before the median class.

• To estimate the mode use: l + [f1 - f0/ 2f1 - f0 - f2] × h

Hope this helps you..!!

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Answer 2

$\huge\boxed{\underline{\underline{\purple{\mathfrak{Answer}}}}}$

$take \: the \: \frac{n}{2} th \: term \\ \frac{ \frac{n}{2} + cf }{f} \times h \\ where \: n = total\: of \: all \: frequency \\ cf =cumiliative\: frequency \\ f = frequency \\ and \: h = class \: interval$

$<marquee direction="left">$ follow the above mentioned steps^_^