statistics

STATISTICS

By: Ethan Corey

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Sharp-nosed Sharks

Male

Female

920 930 940 950 960 970 980 990 1000 1010

952

998

Mean Length of Sharpnosed Shark

Length in millimeters

Gen

der o

f Sh

arks

Sea Turtles

BlueYellow

GreenRed

Orange

0

5

10

15

20

25

Survived

#Hachlings

% of Surviving Turtles in Beach Site A

Survived#Hachlings

Player Color

# of

turt

les

Bottle Caps

21%

4%

9%

14%14%

6%

18%

13% 1%

% of Caps Bottle Caps Washed Up on the Beach

RedOrangeYellowBlueGreenBlackWhiteClearOther

"1-5" "6-10" "11-15" "16-20" "21-25" "26-30"0

1

2

3

4

5

6

7

8

9

Frequency Distribution of Sea Cigars

Size Interval of Sea Cigar in cm.

Amou

nt o

f Man

grov

e Se

ed P

er G

roup

Sea Cigars

Size Class Frequency"1-5" 0"6-10" 1"11-15" 9"16-20" 5"21-25" 7"26-30" 3

Will the Coral Survive

Theoretical

Observed

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

Probability of Coral Survival

What the Probability Was

Trial# Water Temp. Depth Wave Action1 1 2 62 5 4 13 6 4 14 1 6 25 4 6 66 5 2 57 3 3 48 4 4 49 2 3 5

10 1 2 611 3 1 312 3 2 613 6 3 114 2 2 315 4 4 516 5 4 617 1 3 418 4 4 4

Probability is a way to measure the chances that something will occur in relations to the possible alternative

The factors that affect corals survival are the temperature of the water, the water depth, how active the waves are.

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Variance σ2

9131314141515151515161718182021212223232425262830

28.3Variance

The variance (s2) is calculated as:

Variance is a value that is used in Statistics to describe how far away your data sets are from the mean.

∑=sumX=mean of the valuen=number of numberss2= Variance X=each data value

Standard Deviation σ

9131314141515151515161718182021212223232425262830

5.3Slandered Deviation

Standard Deviation describes how spread out the data are.

∑=sumX=mean of the valuen=number of numbersσ= Standard DeviationX=each data value

Theoretical Distribution(TDC)• It is an ideal picture of a

distribution based upon a sampling

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 250

0.5

1

1.5

2

2.5

3

3.5

4

Actual Distribution of 25 Sea Cigars

Length of Sea Cigars in cm.

Freq

uenc

y

4 6 8 10 12 14 16 18 20 22 240

0.5

1

1.5

2

2.5

3

TDC of Sea Cigars by Length

Length of Sea Cigars ijn cm.

Freq

uenc

y

T-Test Equation

The P value has to be less than 0.05 to reject the null

statistics

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