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Anytime you are able to measure something, it is quantitative data. Qualitative data represents the quality of something which cannot be measured.
standard deviation is best measure of dispersion because all the data distributions are nearer to the normal distribution.
frequency distribution contain qualitative data
It is a positively skewed distribution.
The mean of a distribution is a measure of central tendency, representing the average value of the data points. In this case, the mean is 2.89. The standard deviation, which measures the dispersion of data points around the mean, is missing from the question. The standard deviation provides information about the spread of data points and how closely they cluster around the mean.