ECON 2740 Lecture : Ch1.pdf
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18 Apr 2012
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The following frequency distribution reports the number of dollars spent for a group of people during last week.
Dollars | Frequency | Relative Frequency | Midpoint | Cumulative Frequency |
360 up to 420 | 28 | 390 | 28 | 0.29 |
420 up to 480 | 24 | 450 | 52 | 0.25 |
480 up to 540 | 16 | 510 | 68 | 0.16 |
540 up to 600 | 8 | 570 | 76 | 0.08 |
600 up to 660 | 16 | 630 | 92 | 0.16 |
660 up to 720 | 4 | 690 | 96 | 0.04 |
(a) How many people participate in the study?
(b) Calculate the Relative Frequency and enter the results in the above table.
(c) Calculate the Midpoint for each class and enter the results in the above table.
(d) Calculate the Cumulative Frequency and enter the results in the above table.
(e) Construct a Histogram.
(f) Construct a Frequency Polygon.
(g) Construct a Cumulative Frequency Polygon.