Transcript Statistics for Research in Ecology

Average Length of Sharp-nosed
Sharks
1010
1000
Length in Centimeters
990
980
970
960
950
940
930
920
Male
Female
Genders
Survival Rate of Turtle Hatchlings
25
Survival Rate
20
15
Survived:
Started out:
10
5
0
Blue:
Yellow:
Green:
Colors
Red:
Orange:
Percentages of Caps
Other
4%
Red
14%
Orange
1%
Yellow
3%
Clear
31%
Blue
14%
Green
9%
Black
8%
White
16%
Purple
0%
Length of Sea Cigars
14
12
Frequency
10
8
6
4
2
0
"1-5"
"6-10"
"11-15"
"16-20"
Lenght of the Sea Cigars
"21-25"
"26-30"
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Probability- a way to measure the chances that something
will occur in relation to the possible alternatives.
The temperature and depth of the water can affect the
probability of the coral surviving. The amount of nutrients,
oxygen, and wave action can also affect their survival.
There must be plenty of wave action in order for the corals
to survive, the waves bring oxygen and nutrients to their
area.
The depth of the water must be shallow.
The temperature of the water must be around 18 °c – 23
° c, or 74 °F – 84 °F.
Small creatures named Coral Planula depend on the brain
coral as a home. They float around in the ocean for several
days or months until they find an area where they can live
an area with a perfect temperature, depth, oxygen,
nutrients, and wave action.
Variance & Standard Deviation – The two
values to describe how far away your data is
from the mean.
 Variance and Mean are very different from
each other. A mean is the overall average of
all the numbers and a variance is how far
away you are from the mean. Also, variance
and mean have different equations.

3
TDC Sea Cigar Lengths
Theoretical
Distribution
Curve or TDC is
a theoretical or
ideal picture of
a distribution
based upon
random
sampling.
2.5
Frequency
2
1.5
1
0.5
0
0
5
10
15
Length of Sea Cigars in Centimeters
20
25
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The Chi-Square test is used to see if there are any significant
differences between data sites or sources. In order get our data
we played the sea turtle game. First we split up into groups of 4
and were assigned a beach A, B, C, D, or E. We started with 25
sea turtles and had to try to avoid all the obstacles and we
recorded how many sea turtles were still alive at the end of the
game.
There are many things that can affect the survival rate of Sea
Turtles. There could be trash on the beach which would affect
the sea turtle since they can get caught in it and become major
obstacles. Predators such as raccoons, birds, and more eat the
turtle eggs which would also affect the turtles in a negative way.
People can also disturb the turtles nesting sites by planting their
umbrellas in the ground above the nest or sitting on them.
P= .001545
Since p<.05, we reject the null hypothesis, and accept the
alternative hypothesis. Therefore, there is a significant difference
in survival rates between Beach Sites.
The P value is 0.268386
therefore I cannot
reject the null because
it is above 0.05.
Although there was no
significant difference
there was difference
between the
observations taken
through out the
experiment.
Control
Group
Start
Date:
Pupation
Date:
Total
Days:
Treatment
group
Start
date:
Pupation
Date:
Total
Days
C1
6-21-12
7-14-12
23
T1
6-21-12
7-11-12
20
C2
6-21-12
7-14-12
23
T2
6-21-12
7-14-12
23
C3
6-21-12
7-11-12
20
T3
6-21-12
7-14-12
23
C4
6-21-12
7-14-12
23
T4
6-21-12
DIED
DIED
C5
6-21-12
7-11-12
20
T5
6-21-12
7-14-12
23
C6
6-21-12
7-11-12
20
T6
6-21-12
7-14-12
23
C7
6-21-12
7-10-12
19
T7
6-21-12
7-14-12
23
C8
6-21-12
7-14-12
23
T8
6-21-12
7-14-12
23
C9
6-21-12
7-14-12
23
T9
6-21-12
7-12-12
21
C10
6-21-12
7-14-12
23
T10
6-21-12
7-14-12
23
C11
6-21-12
7-14-12
23
T11
6-21-12
7-14-12
23
C12
6-21-12
7-12-12
21
T12
6-21-12
7-14-12
23
C13
6-21-12
7-12-12
21
T13
6-21-12
7-11-12
20
C14
6-21-12
7-14-12
23
T14
6-21-12
7-14-12
23
C15
6-21-12
7-14-12
23
T15
6-21-12
7-14-12
23