The following table gives the cumulative frequency distribution of annual income

Question

The following table gives the cumulative frequency distribution of annual incomes (in thousands of dollars) for a sample of 200 families selected from a ci

27. The cumulative relative frequency of the fourth class, rounded to three decimal places, is:

28. The sample size is: 29. The cumulative percentage for the second class, rounded to one decimal place, is:

30. The percentage of families with an income of less than $55,000, rounded to one decimal place, is:

31. The percentage of families with an income of $70,000 or more, rounded to one decimal place, is:

32. The number of families with an income of $40,000 or less is: 33. The number of families with an income of $85,000 or more is:

income($1000's) f 10 to less than 25 25 10 to less than40 79 10 to less than 55 149 10 to less than 70 167 10 to less than 85 191 10 to less than 100 200

Explanation / Answer

27. The cumulative relative frequency of the fourth class is 0.835.

28. The sample size is 200

29. The cumulative percentage for the second class is 39.5%

30. The percentage of families with an income of less than $55,000 is 74.5%

31. The percentage of families with an income of $70,000 or more is 16.5

32. The number of families with an income of $40,000 or less is 79

33. The number of families with an income of $85,000 or more is 9

Income Cumulative frequency Income Frequency Relative frequency Cumulative relative frequency 10<=I<25 25 10<=I<25 25 0.125 0.125 10<=I<40 79 25<=I<40 54 0.27 0.395 10<=I<55 149 40<=I<55 70 0.35 0.745 10<=I<70 167 55<=I<70 18 0.09 0.835 10<=I<85 191 70<=I<85 24 0.12 0.955 10<=I<100 200 85<=I<100 9 0.045 1

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