Transcript BY ANDY GONZALEZ - University of Miami

STATISTICS AND
COMPUTER
SHARP NOSE SHARK
1010
Average Shark Length
1000
990
980
970
960
950
940
930
920
male
female
Gender of shark
Sharp nose sharks
Hatchling turtles
Hatchling Turtles Survival Race to the Sea
140
120
100
Turtle
hatchlings
80
60
survivor
hatchlings
40
20
0
blue
yellow
green
red
orange
Probability of Planula survivals
Date: June 23 09
Time: 10:30 am
Weather: stormy
Wave action: very rough
Water clarity: silty with
little sunlight
Distribution of 25 sea cigar
12
Red Mangrove Sea Cigar Seed
Size
10
8
6
4
2
0
size of sea
cigar
Sea cigars on a shore.
PERCENT OF FLOTSAM
Flotsam
sargassum.08%
1%
manatee grass
11%
4%
4%
detritivoe 2%
turtle
grass
78%
TDC
THEORETICAL DISTRIBUTION OF 25 SEA CIGARS
6
5
F
R 4
E
Q
E
3
U
N
C
E 2
Y
THEORETICAL
DISTRIBUTION
1
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
LENGTH OF SEA CIGARS
Variance
Two values that are used in statistics to describe
how far away your data are from the mean are Variance
and Standard deviation.
Set 1: 8,9,10,11,12
Set 2: 1,2,10,17,20
In the first set ,there is not much variation away from
the mean. In the second set the other values are farther
away from the mean.
Standard Deviation
 One standard deviation is considered the numerical
distance away from the mean in the positive and
negative direction. So we say that it is plus or minus
some number away from the mean.
Chi-square
The chi-square test can be used to see if there are
any significant difference between data sites or
sources. We will use the chi-square test to determine
if there are any significant differences between
survival rates at our “SEA TURTLE BEACH SITES”
when we play the SEA TURTLE GAME.
T-TEST
THE T-TEST EQUATION CAN BE USE TO CALCULATE THE
T-STATISTIC IS ONE DESINGNED TO TEST WHETHER
THERE IS A SIGNIFICANT DIFFERENCE BETWEEN THE
MEANS OF TWO INDEPENDENT SAMPLES THOSE OF
YOUR (1) TREATMENT AND (2) CONTROL GROUPS.
Survival rate of caterpillars subjected to fructose
Specimen
number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Control group
Survived
Died
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Survived
Treatment
group
Survived
Died
Survived
Survived
Survived
Died
Survived
Survived
Survived
Survived
Survived
Died
Survived
Survived
Survived
Died
c-live
c-died
t-lived
t-died
observed
15
1
12
4
Painted lady butterfly
Predicted
13.5
2.5
13.5
2.5
Painted lady caterpillar
and chrysalis