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Displaying Qualitative andQuantitative dataFrequencyDistributionsFrequency DistributionsA frequency distribution is a display of the values that occurin a data set and how often (or how frequently) each value, orrange of values, occurs.Frequencies (f) are the numbers of data values in thecategories of a frequency distribution, or the number of timesthat data value or those values occur.A class is a category of data in a frequency distribution.An ungrouped frequency distribution is a frequencydistribution where each category or class represents a singlevalue.A grouped frequency distribution is a frequency distributionwhere the classes are ranges of possible values.Frequency Distributions by Hand1. Decide how many classes should be in the distribution.There are typically between 5 and 20 classes in a frequency distribution.Create a frequency distribution using five classes for the list of 3-D TV prices3-D TV Prices (in Dollars and in an Ordered Array)15951599168516991699169916991757178717991799188518881899189918991984199919991999Frequency Distributions by Hand2. Choose an appropriate class width.A good place to start is to subtract the lowest data value from the highest anddivide by the number of classes.1999 − 1595 404== 80.8 ≈ 8155This would give us a class width of $81.Instead, it would be more reasonable to group TV prices by intervals of $100.Therefore, we will choose our class width to b ...
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