The number of class intervals in a frequency distribution is usually between ___________.
举一反三
- Which of the following best describes a frequency distribution A frequency distribution is a grouping of:（） A: data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. B: selected data into intervals (classes) so that the number of observations in each of the non - overlapping intervals (classes) can be seen and tallied. C: dependent intervals (classes) so that they can be seen and tallied.
- The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.
- True or False: The larger the number of observations in a numerical data set, the larger the number of class intervals needed for a grouped frequency distribution.
- The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed. Class Interval Frequency 20-under 40 30 40-under 60 45 60-
- True or False: Determining the class boundaries of a frequency distribution is highly subjective.