Transcript Computers & Statistics

By Mai Fukata
Number of Sea Turtle
hatchlings that survived
140
120
Number of
sea turtles
100
80
All
60
Sites
40
20
0
Blue
Yellow
Green
Red
The color of the turtle
Orange
Atlantic Sharp-nose Sharks(Mean/Average)
1010
1000
990
980
970
The Mean of
the Atlantic
Sharp-nose
sharks
960
Series1
950
940
930
920
Male
Female
Type of Gender
The meaning of probability is…
A way to measure the chances that something
will occur in relation to the possible alternatives
Distribution of 25 Sea Cigars
20
Number of the Sea
Cigars
10
Number
0
"1-5"
"6-10"
"11-15"
"16-20"
Length of the Sea Cigars
"21-25"
"26-30"
Number
Below left: Mangrove sea cigar seedlings. Below right: Sea cigar,
leaves, and the branch of a red mangrove tree.
Percent Composition by Mass of the Flotsam
Sea Grape
Turtle Grass
Manatee Grass
Shoal Grass
Red Manatee Leaf
Black Manatee Leaf
Detritivores
Meaning: Two values that are used in statistics to
describe how far away your date from the mean
6.7,
7.3, 7.5, 7.5, 9.4, 9.8, 11.2,
12.5, 13.1, 17.0(Measured in
centimeters)
Theoretical Distribution
4
3
Number of
2
Sea Cigars
Theoretical
Distribution
Actual Data
1
0
1
3
5
7
9 11 13 15 17 19 21 23 25
Length
The Chi-square test
can be used to see if
there are any
significant differences
between date sites or
sources
T-test: an equation you use designed to test whether
there is a significant difference between the means of
two independent samples.
Question: Should the Fearless Fishers have rejected the
null hypothesis? (Explain, using the T-statistic you
generated and the table of critical values provided)
Answer: Yes, the Fishers should have rejected the null
hypothesis because their T-statistic value was
calculated to be 3.75, which is greater than the critical
value of 2.145 from the T-statistic table at 14 degrees of
freedom and at the P-value of 0.05.