The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?

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.2 or 20% of the group scored within that interval.

how you got 20%

The value 0.2 in the relative frequency table indicates the proportion of the total data that falls within the class interval 50-59. In other words, it represents the fraction of the data that belongs to that specific class.

To calculate the relative frequency, you need to divide the frequency of a particular class by the total number of observations in the dataset. In this case, if the relative frequency is 0.2, it means that 20% of the data falls within the class interval 50-59.