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Coin Slide - PowerPoint PPT Presentation

Coin Slide. Are you game? Timothy Kariger and Taylor Young. The procedure. Participants slide coins across a desk, trying to get the coin to stop in a goal zone marked by tape. Categories of data we recorded are: finger used to slide coin, gender, preferred coin, and number of coins landed.

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PowerPoint Slideshow about ' Coin Slide' - kirk

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Presentation Transcript

Coin Slide

Are you game?

Timothy Kariger and Taylor Young

Participants slide coins across a desk, trying to get the coin to stop in a goal zone marked by tape.

Categories of data we recorded are: finger used to slide coin, gender, preferred coin, and number of coins landed

Mean- 17.26

Min-4

Q1- 12

Median- 23

Max- 29

Roughly uni model

Roughly symmetric

Normal probability plot is linear

Number of coins landed follows a

normal distribution

Quantitative vs gender

Quartiles for genders-

Girls- Q1=11, Q3=23

Boys-Q1=12, Q3=23

Mean coins landed

Girls- 17.18

Boys- 17.35

Median for girls: 19.5

Median for boys:16

Min and max (range)

Girls- 6,26(20)

Boys- 4, 29(25)

22 girls total

17 boys total

Highest number of coins landed: 29

29 coins were landed in two different trials

Both a pointer finger and a middle finger

landed 29 coins

More people used pointer fingers (31 to 8)

Median number of coins landed:

Middle- 18

Pointer- 19

Mean number of coins landed:

Middle- 16.75

Pointer-17.39

Under Tim

mean coins landed= 16.53

Median coins landed=16

Min=4 max= 29

Quartiles- Q1= 11, Q3= 23

Under Taylor

Mean coins landed=17.7

Median coins landed=19.5

Min= 7 max= 29

Quartiles- Q1= 13, Q3=22.5

% of preferred

Dimes- 10.3

Nickels- 15.4

Pennies- 10.3

Quarters- 64.1

56.4% tested were female

43.5% tested were male

Percent of females that preferred:

Dimes- 18.2

Nickels- 22.7

Pennies- 4.5

Quarters- 54.5

Percent of males that preferred:

Dimes- 0

Nickels- 5.9

Pennies-17.6

Quarters- 76.5

%of pennies preferred by:

Females-25

Males-75

% of nickels preferred by:

Females- 83.33

Males-16.67

% of dimes preferred by:

Females- 100

Males- 0

%of quarters preferred by:

Females- 48

Males- 52

• Conditions for Chi squared test for independence were not met

• 2 Expected counts were not greater than 5

If Marginal of Gender=conditional of coins, then the two are independent

But because the percentages of the conditionals are not similar, the two have some dependence.

• Females were more consistent

• Tim was a harder judge, the mean and median of his scores were lower

• Quarters were most popular coin

• Gender affects preferred coin

• Lurking Variables-

• Coins displayed to participants may not have been evenly distributed

• Harshness of judge could affect number of coins landed