Question

formula of mean median mode of​

Answer 1

Answer:

The Mean, Median and Mode are the three measures of central tendency. Mean is the arithmetic average of a data set. This is found by adding the numbers in a data set and dividing by the number of observations in the data set. The median is the middle number in a data set when the numbers are listed in either ascending or descending order. The mode is the value that occurs the most often in a data set and the range is the difference between the highest and lowest values in a data set.

Answer 2

Answer:

FORMULAE:

Mean-

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

2) Assumed mean method:Here, a = assumed mean. fi = frequency of ith class. di = xi – a = deviation of class.

Mode-L + (fm - f1) x h / (fm - f1) + (fm - f2)

Median- {(n + 1) ÷ 2}th, where “n” is the number of items in the set and “th” just means the (n)th number. To find the median, first order the numbers from smallest to largest. Then find the middle number.

Explanation:

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