Question

For the frequency distribution of a set of data, n= 200. Ef (x-240)=0. Ef(x-240)sq=1250 and median = 246, find coefficient of skewness.(statistics)​

Answer 1

Pearson’s Coefficient of Skewness #1 uses the mode. The formula is:

pearson skewness

Wherexbar= the mean, Mo = the mode and s = the standard deviation for the sample.

See: Pearson Mode Skewness.

Pearson’s Coefficient of Skewness #2 uses the median. The formula is:

Pearson's Coefficient of Skewness

Wherexbar= the mean, Mo = the mode and s = the standard deviation for the sample.

It is generally used when you don’t know the mode.

Sample problem: Use Pearson’s Coefficient #1 and #2 to find the skewness for data with the following characteristics:

Mean = 70.5.

Median = 80.

Mode = 85.

Standard deviation = 19.33.

Answer 2

Answer:

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