StatisticsBy Sonia Rodriguez

Sharp-nosed Shark

MALE

FEMALE

920 930 940 950 960 970 980 990 1000

Sharped-nosed Shark

Series1

lenghth in mm

Info. T h e a v e ra g e

is fo u n d b y

a d d in g a l l

t h e d a t a

a n d

d iv id in g i t

b y a s m a n y

n u m b e r s

y o u h a v e .

Info. The average is found by adding all the data and dividing it by as many numbers you have.

Sea Turtles

Info.Above is the percentage of our sea turtle hatchlings that lived playing a board game. Though not many survive, all of us started with 25 and barely any survived. We found the percentage of each one by dividing the number that survived by the total.

blue

yellow

green

red

orange

0 5 10 15 20 25

number of hatchlingssurvived

Percentage of Hatchlings

Colo

r

Percentage of Bottle CapsRed18%

Orange9%

Yellow8%

Blue11%Green

12%

Black12%

White20%

Clear9%

Percentage of Bottle Cap by Percentage

Info.Here it shows the percentage of bottle caps in just one small container from the beach. You get the number of a certain color then divide it by the total.

Frequency Distribution of Sea Cigars by Size Class

"1-5" "6-10" "11-15" "16-20" "21-25" "26-30" "31-35"0

2

4

6

8

10

12

Frequency

frequency

Size Intervals

Num

ber o

f Sea

Cig

ars

Info.So today we collected 25 seed pods for each group, then we measured and ordered them from least to greatest.

size class frequency

"1-5" 0

"6-10" 1

"11-15" 5

"16-20" 12

"21-25" 4

"26-30" 2

"31-35" 1

Probability

theoretical

observed

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

Chance of Survival Rate of CoralTitle

Series1

Probability

Info.So today we played a game and we tested the probability of coral reefs survival using a die. Only 7/18 of mine survived. Some factors that affect coral survival are fisher men, boaters people taking coral etc. So please stop and save the reefs.

Probability:The possibility that an event occurs, shown as the ratio of the number occurrences to the total number of possible occurrences.

Variance and Standard Deviation

Variance:A difference or discrepancy between the number and the mean.

6.77.37.57.59.49.8

11.212.513.1

1710.77556Varience3.282614Standard Deviation

Standard Deviation: Equal to the square root of the mean of the squares.

TDC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 230

0.5

1

1.5

2

2.5

3

3.5

4

4.5

Size in centimeters

frequency

4 6 8 10 12 14 16 18 20 22 240

0.5

1

1.5

2

2.5

3

Length in centimeters

frequency

Size Frequency6 0.38 0.8

10 1.512 2.214 2.516 2.218 1.520 0.822 0.3

T-Test control treatment

14 1413 1313 1513 1513 1513 14

14 14 15 15 0.000545

T-test:Tests whether the means of two groups are statistically different from each other.