Evidence of Exam Rigging in Chicago
Exploring Histograms
Evidence of Exam Rigging in Chicago
“In the Sanitary District of Chicago, operating engineers are hired on the basis of a competitive civil-service examination.” On March 12, 1966, 223 applicants took the exam for 15 jobs. Shortly after the results of the exam were released, the examiners were charged with rigging the exam.
Based on the data below…
Are the examiners guilty?
|SCORE |FREQ | |SCORE |FREQ | |SCORE |FREQ |
|26 |1 | |49 |4 | |71 |2 |
|27 |4 | |50 |2 | |72 |1 |
|29 |1 | |51 |5 | |73 |1 |
|30 |4 | |52 |5 | |74 |3 |
|31 |3 | |53 |5 | |75 |2 |
|32 |2 | |54 |5 | |76 |2 |
|33 |5 | |55 |3 | |78 |1 |
|34 |3 | |56 |5 | |80 |4 |
|35 |2 | |57 |4 | |81 |3 |
|36 |3 | |58 |8 | |82 |2 |
|37 |7 | |59 |4 | |83 |4 |
|39 |7 | |60 |6 | |84 |7 |
|40 |1 | |61 |6 | |90 |3 |
|41 |1 | |62 |3 | |91 |3 |
|42 |5 | |63 |2 | |92 |3 |
|43 |8 | |64 |1 | |93 |4 |
|44 |6 | |65 |1 | |95 |2 |
|45 |7 | |66 |3 | | | |
|46 |6 | |67 |4 | | | |
|47 |6 | |68 |2 | | | |
|48 |7 | |69 |8 | | | |
1. Link the data into your calculator. The data is stored under the program CSD.
2. Calculate the one-variable statistics of the data.
3. Create a histogram using the ZOOMSTAT feature.
4. Create histograms using class widths of 1, 5, 10, and 15.
5 Based on the display of the data, write a closing argument for the law firm which represents the individuals who have hired the firm to support your findings.
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