measures of central tendency, ungrouped L6

ungrouped

ungrouped data

Is a set of values that is not organized or classified as a group. A measure of central tendency is a value that represents the whole set of data. these are mean, median and mode.

mean

of ungrouped data is obtained by adding all the values divided by the frequency of a set of data. the mean of ungrouped data is also called average. it is written as

is the mean

is the sum of all the values in a set

is the frequency

median

of ungrouped data is the middle value of a set of data when all values are arranged in either ascending or descending order, arrange the data in ascending order

odd

the middle value will be median of the set of data.

even

the median of the data is the mean of the data is the mean of the two middle values.

to find middle values of the data used this formula

mode

of the ungrouped data is the value thst mot frequently appears in a set of data. when the value in a set of data appears only once, then the data has no mode.

unimodal

one mode

bimodal

two modes

multimodal

more than 2 modes