Download Statistics - University of Miami

By Tony Cai
Average Length of Sharpnose Sharks
1000
990
980
970
Series1
960
950
940
930
920
Male
Female
Dead or Alive Turtle Game
140
120
100
80
Survived
60
Hatched
40
20
0
Blue
Yellow
Green
Red
Orange
25 Sea Cigars
Frequency of 25 Sea Cigars
25
Frequency
20
15
10
5
0
"1-5"
"6-10"
"11-15"
16-20
Length of Sea Cigars(cm)
21-25
26-30
Mass of composition of Flotsam
detritus mass
sea grape 2g
turtle grass 21.5g
0% 0%
11%
8%
81%
shoal grass 3g
detritivores 0.125g
Probability
Probability
Variance
 Variance is used in statistics to determine how much
variation is from the mean.
 Standard Deviation determines how spread out the
data are.
Theoretical Distribution
Theoretical Distribution of Sea Cigars
4
3.5
3
2.5
Theoretical Distribution
2
1.5
Actual Data
1
0.5
0
1
3
5
7
9
11
13
15
17
19
21 23 25
Chi-Square
Chi-Square measures if there are any significant
differences between data sites or sources.
Sum(observed –predicted)
predicted
T-test
The p-value of 0.000545 is less than 0.5, and 14 degrees
of freedom, which means that there is a significant
difference between the control and the treatment.
The t-test determines whether there is a significant
difference between the means of two independent
samples, those of your treatment and control groups.