Upload
chad-thompson
View
215
Download
0
Embed Size (px)
Citation preview
Statistics Class
Male
Female
920 930 940 950 960 970 980 990 1000
Mean Length Atlantic Sharp-Nose Shark
LENGHT IN MM
Gender of sharks
Males Females920 850928 932935 960943 960950 965950 972954 980960 980962 985974 995975 1000975 1000
10091010101010101020102510251028103010381043105410601160
The sharp –nosed shark consumes shrimp, mollusks and small fishes.
blue yellow green red orange
0
5
10
15
20
25
Survived
# hatchlings
Sea Turtle DataBeach Site F
Color Survived # hatchlingsblue 13 25yellow 25 25green 18 25red 3 25orange 4 25
Sea Turtles Sea turtles often drown when caught in fishing gear: both nets and loglines. Coastal development can destroy important nesting sites, impact coral reefs, and artificial light from houses and other buildings distracts hatchlings away from the ocean.
21%
4%
9%
14%14%6%
18%
13%1%
Percentage of bottle caps found on the beach
red orange yellow blue green purple black white clear other
Color of bottle cap
# of caps
Percentage
red 18 21orange 3 4yellow 8 9blue 12 14green 12 14purpleblack 5 60white 15 18clear 11 14other 1 1
The “garbage patches” are areas of marine debris concentration (due to oceanographic features)in the North Pacific Ocean. The term “garbage patches”is a misnomer. There is no island of trash forming in the middle of the ocean nor a blanket of trash that can be seen with satellite or aerial photographs.
"1-5" "6-10" "11-15" "16-20 "21-25" "26-30" "31-35"0
2
4
6
8
10
12
14
Frequency Distribution of Sea Cigars by Size(cm)
Size Class (cm)
Fre
quency
Size Class Frequency"1-5" 0"6-10" 1"11-15" 4"16-20 13"21-25" 4"26-30" 2"31-35" 1
theoreticalobserved
0
0.2
0.4
0.6
Probability of Observed and Theoretical Survival
Survivalp
rob
ab
ilit
y
Water temp. Depth
Wave action survived
1 3 1 4yes2 1 1 1no3 4 2 4yes4 2 3 2no5 4 1 4yes6 3 2 4yes7 6 5 5no8 1 5 5no9 6 3 3no
10 3 2 5yes11 2 1 6yes12 2 3 5yes13 1 4 6no14 6 4 5no15 6 6 1no16 3 3 2no17 3 2 5yes18 3 3 6yes
theoretical observed0.22 0.5
Coral reefs are found all around the world in tropical and subtropical oceans. They are usually found in shallow areas at a depth of less than 150 feet. However, some coral reefs extend even deeper, up to about 450 feet deep.
Variance
𝜎 2=∑¿ ¿
The squared version of the standard deviation
Standard deviation
Shows how much variation or dispersion exists from the average
𝜎=√𝑉𝑎𝑟𝑖𝑎𝑛𝑐𝑒
1 2 3 4 5 6 7 8 9 10111213141516171819202122230
1
2
3
4
5
Actual distribution of sea cigars
Size(cm)
Fre
quency
4 6 8 10 12 14 16 18 20 22 240
2
4
6
8
10
12
TDC
Size(cm)
Fre
quency
*TDC: Theoretical picture of distribution based upon random sampling. Serves as a standard with the actual distributions can be compared.
T-Test
𝑇=¿ ¿
A t-test is any statistical hypothesis test in which the test statistic follows a Student's t distribution if the null hypothesis is supported.