When constructing a frequency distribution, classes should be selected so that they are of equal width.
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举一反三
- True or False: When constructing a frequency distribution, classes should be selected so that they are of equal width.
- 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.
- In a frequency distribution histogram, the frequency of an interval is given by the:（） A: width of the corresponding bar. B: height multiplied by the width of the corresponding bar. C: height of the corresponding bar.
- When studying the simultaneous responses to two categorical questions, we should set up a( ). A: contingency table. B: frequency distribution table. C: cumulative percentage<br/>distribution table. D: histogram.
- The percentage distribution cannot be constructed from the frequency distribution directly.
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The basic principle of equity distribution is（ ） A: The equal distribution of shares. B: The reverse hanging of equity holders. C: The people are scattered. D: The interest structure should be reasonable and positively related to contribution.
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A research analyst was directed to arrange raw data collected on the yield of wheat, ranging from 40 to 93 bushels per acre, in a frequency distribution. He should choose 30 as the class interval width.（
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The variance of a Poisson distribution is equal to _______.
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The number of class intervals in a frequency distribution is usually between ___________.
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Men and women should receive equal pay when they perform work that involves similar skills and responsibility.