Q7. Use the results from the following survey of 500 firms to answer the question. Number of Employees Frequency 300 up to 400 40 400 up to 500 62 500 up to 600 78 600 up to 700 101 700 up to 800 131 800 up to 900 88 The cumulative relative frequency of the second interval (400 to 500) is: A) 12.4%. B) 20.4%. C) 10.2%.
Q8. Which of the following best describes a frequency distribution? A frequency distribution is a grouping of: A) selected data into intervals (classes) so that the number of observations in each of the non-overlapping intervals (classes) can be seen and tallied. B) independent intervals (classes) so that they can be seen and tallied. C) data into intervals (classes) so that the number of observations in each of the non-overlapping intervals (classes) can be seen and tallied.
Q9. Given the following frequency distribution: Interval Frequency 10 up to 30 5 30 up to 50 10 50 up to 70 15 70 up to 90 5 Which of the following statements is least accurate? A) The relative frequency of the second interval is less than 15. B) The absolute frequency of the third interval is 15. C) The number of observations is greater than 30. | 
发表于 2008-12-31 16:38
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