1.3 measures of central tendency

Central tendency

Set of measurements is the tendency of the date to cluster, or center, about certain numerical values

3 measures of central tendency

Mean, median, mode

Mean

Sum of of measurements divided by total number of measurements

Central tendency

A statistical measure that identifies a single value as representative of an entire distribution.

Sample mean

Population mean

Resistant

the mean is not ____ to extremes values in data set

Median

Set middle value when the measurements are arranged in ascending or descending order

Sample mean

m

is Resistant

Median ____ ____ to extreme values in data set

Mode

Measurement that occurs most frequently

Shape

How data is distributed

Skewed

One tail of the data’s distribution has more extreme observations that the other ta

Left skewed

Mean is less that the median of data set

Right skewed

Mean with be greater than the median value