Frequency

Levels of Measurement

Nominal scale level

Ordinal scale level

Interval scale level

Ratio scale level

Is qualitative. Categories, colors, names, labels, along with yes or no responses.

Responses to questions about the cruise are “excellent,” “good,” “satisfactory,” and “unsatisfactory.”

Has a definite ordering. The data does not have a starting point.

Takes care of the ratio problem and gives you the most information.

Are not ordered.

Can be ordered.

Can be used in calculations, but one type of comparison cannot be done.

Has a 0 point and ratios can be calculated

Frequency

Is the number of times a value of the data occurs

Relative frequency

Is the ratio (fraction or proportion) of the number of times a value of the data occurs in the set of all outcomes to the total number of outcomes

Rf=f/N

Cumulative relative frequency

is the accumulation of the previous relative frequencies.

CEF= Rf1+Rf2