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A frequency distribution in which the data is only nominal or ordinal. Ungrouped Frequency Distribution. A frequency distribution of numerical data. The raw data is not grouped. Grouped Frequency Distribution. A frequency distribution where several numbers are grouped into one class.
In statistics, a unimodal probability distribution (or when referring to the distribution, a unimodal distribution) is a probability distribution which has a single mode. As the term mode has multiple meanings, so does the term unimodal.Strictly speaking, a mode of a discrete probability distribution is a value at which the probability mass function (pmf) takes its maximum value. In other words, it is a most likely value.s the term mode has multiple meanings, so does the term unimodal. Strictly speaking, a mode of a discrete probability distribution is a value at which the probability mass function (pmf) takes its maximum value.