The index of qualitative variation is a statistic expressing: the variability of an interval-ratio variable. the central tendency of an ordinal variable. the probability that a qualitative variable has for taking a specific value. the diversity found among the categories that make up a nominal variable.
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Even though the Index of Qualitative Variation is design to be used with nominal data, it can be used with ratio data as well. Let’s consider the variable “number of siblings.” Let’s assume that there are nine categories: 0, 1, 2, 3, 4, 5, 6, 7, and 8. If the Index of Qualitative Variation equals zero, does that mean that the standard deviation has to equal zero? Please explain.
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Which measure of variability is used for nominal variables, such as gender and political party? mode Index of qualitative variation standard deviation stratified variance
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Read the newspaper article and identify (a) the research question the study addresses, (b) the population, (c) the sample, $(d)$ the descriptive statistics, and (e) the inferences of the study. Nominal versus Ordinal Just as a quantitative variable can be further classified as discrete or continuous, we can classify a qualitative (or categorical) variable as nominal or ordinal. A nominal variable is a qualitative variable that describes an attribute of an individual. An ordinal variable is a qualitative variable that has all the properties of a nominal variable, but also has observations that can be ranked or put in order. For example, gender is a nominal variable, whereas a response to a customer satisfaction survey of poor, fair, good, or outstanding is considered ordinal. For each of the following qualitative variables, determine whether the variable is nominal or ordinal. (a) Hair color (b) Letter grade in a statistics class (c) Make of a television set (d) Rank of a military officer (e) Method of payment (cash, check, debit card, credit card)
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