Are snakes Left-Handed or and Sometimes a snake w CO or curl up, so that its lef
ID: 3182634 • Letter: A
Question
Are snakes Left-Handed or and Sometimes a snake w CO or curl up, so that its left side is pointing in. Sometimes a snake will coil so that ts right side is pointing in following experiment, several cottonmouth snakes were observed over a period of tmes The observers recorded proportion of time that each one of the snakes coiled to the left Four different categories of snakes were observed: adult females (n 15), adult males (n 5),juvenile females (n 5), and juvenile males (n-5). Assume that the measure "proportion of left-handed coils" is normally distributed The table below shows the proportion of left-handed coils that was recorded for each of the snakes 0.582 0.585 0.550 0.554 0.609 0545 0544 0,600 0638 0,656 Adult Females 0,600 0.696 0.424 0.493. 0.491 Adult Males 0563 0.S56 0522 0.541 0.395 Juvenile Females 0512 0556 0565 0.417 0429 Maler 0486 0Ag2 0AT5 0.464 0493 enile 1 The nheoExplanation / Answer
Answer:
a).
Df= n-1=4
b).
Descriptive statistics
AF
AM
JF
JM
count
15
5
5
5
mean
0.57120
0.51540
0.49580
0.48200
sample standard deviation
0.06920
0.06912
0.06955
0.01235
c).
AM: t=0.4982
JF: t = -0.135
JM: t = -3.2593
d). JM
e). JM
f). JF
3).
Left Handed: AF ( mean proportion is large)
Right Handed: JM ( mean proportion is low)
t Test for Hypothesis of the Mean AM
Data
Null Hypothesis m=
0.5
Level of Significance
0.05
Sample Size
5
Sample Mean
0.5154
Sample Standard Deviation
0.069118015
Intermediate Calculations
Standard Error of the Mean
0.0309
Degrees of Freedom
4
t Test Statistic
0.4982
Two-Tail Test
Lower Critical Value
-2.7764
Upper Critical Value
2.7764
p-Value
0.6445
Do not reject the null hypothesis
t Test for Hypothesis of the Mean JF
Data
Null Hypothesis m=
0.5
Level of Significance
0.05
Sample Size
5
Sample Mean
0.4958
Sample Standard Deviation
0.069546387
Intermediate Calculations
Standard Error of the Mean
0.0311
Degrees of Freedom
4
t Test Statistic
-0.1350
Two-Tail Test
Lower Critical Value
-2.7764
Upper Critical Value
2.7764
p-Value
0.8991
Do not reject the null hypothesis
t Test for Hypothesis of the Mean JM
Data
Null Hypothesis m=
0.5
Level of Significance
0.05
Sample Size
5
Sample Mean
0.482
Sample Standard Deviation
0.012349089
Intermediate Calculations
Standard Error of the Mean
0.0055
Degrees of Freedom
4
t Test Statistic
-3.2593
Two-Tail Test
Lower Critical Value
-2.7764
Upper Critical Value
2.7764
p-Value
0.0311
Reject the null hypothesis
Descriptive statistics
AF
AM
JF
JM
count
15
5
5
5
mean
0.57120
0.51540
0.49580
0.48200
sample standard deviation
0.06920
0.06912
0.06955
0.01235
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