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Cheat or Honest? An Experiment Department of Statistics Rachel Fewster.

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Presentation on theme: "Cheat or Honest? An Experiment Department of Statistics Rachel Fewster."— Presentation transcript:

1 Cheat or Honest? An Experiment Department of Statistics Rachel Fewster

2 Catch the Cheats! I am a fraud investigator, you are the suspects! Each group picks a status: Honest or Cheat You can change the status that you pick if you like, but WRITE DOWN your new status on your slip (no erasing the evidence!!)

3 HONEST GROUPS: 1.Pick a column on the atlas sheets: Population, Area sq km, or Area sq miles 2. Pick a start-point wherever you like 3. Copy down 100 entries from your column: just the first two digits is enough. E.g. for write 2600 (dont round it) For 782 write 780.

4 CHEATING GROUPS: 1.Make up the numbers out of your head! 2.Again just use two digits, e.g. 530, 72000, , … 3.You can use the atlas sheets as a guide to range of numbers, but you must MAKE YOUR NUMBERS UP.

5 Now for the investigation! 1.UNDERNEATH your numbers … Make out a TALLY LIST for FIRST DIGITS in your output:

6 I I III I IIII I II III 1.Make out a TALLY LIST for FIRST DIGITS in your output:

7 I III I IIII I II III 2. Rewrite the tally as numbers 3. Title First Digit First Digit

8 I III I IIII I II III First Digit 7. Fold your paper, tear off the tallies from the rest. 8. Write your name on the tallies section and hand in!

9 Can we catch the cheats ??? See the R demonstration at:


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