By : Hiba Khalil

Sea Turtles

Percentage Of BOTTLE CAP Color

Definition of Probability• Probability is a way to measure chances that

something will occur in relation to the possible alternatives.

• The Temperature of the water can affect the Probability of Coral Survival (18°C-23°C/74°F-84°F) .The depth of the water where the Coral is found can affect the Coral. The corals are found no deeper than50-70M.The wave action of the waves can affect the Corals. If the coral has no emergence to air. If the Coral does not have access to light the Coral can die.

Variance

• Variance – Two values that are used in Two values that are used in statistics to describe how far away you are statistics to describe how far away you are from the mean.from the mean.

• Variance is different than mean because for Variance is different than mean because for the mean you are finding the average and the mean you are finding the average and the variance is how much variation exists the variance is how much variation exists around the average. around the average.

Theoretical Distribution Curve (TDC)

A theoretical or ideal picture of a distribution based upon random sampling.

Theoretical Distribution of 25 sea cigar length

F r

e q

u e

n c

y

Length of sea cigar lengths ( in cm)

T-test

• The T-test equation you will use to calculate the T-

statistic is one designed to test whether there is a significant difference

between the means of two independent samples, those

of your treatment (1) and control groups (2).

The T-Test contains the:MeanVariance Probability (Less than 0.05)The number Degree of freedom (DF)

• 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 Chi-Square test can be used to see if there are significant differences data sites or sources.

• Effects On Baby Sea Turtle Hatchlings

Chi-Square Test

Good Effects Bad Effects

No predators are near the beach .

Many Predators eat the eggs of the turtles.

There is no light to make the mama turtle think it’s the moon.

There is a city that has so much lighting .

The beach is a clean beach.

The beach is not a clean beach.

Human do not harm any eggs and protect the beach.

Human destroy the eggs. Ex. Walking on the eggs and driving on the eggs etc.

Control Group

TOTAL DAYS

TREATMENT GROUP

TOTAL DAYS

C1 23 T1 20

C2 23 T2 23

C3 20 T3 23

C4 23 T4 DIED

C5 20 T5 23

C6 20 T6 23

C7 19 T7 23

C8 23 T8 23

C9 23 T9 21

C10 23 T10 23

C11 23 T11 23

C12 21 T12 23

C13 21 T13 20

C14 23 T14 23

C15 23 T15 23

We cannot reject the null Hypothesis because there is no difference.The t-test gave us 0.268386.