8.81 Underwater sound-locating ability of alligators. Alligators have shown the ability to determine the direction of an air- borne sound. But can they locate underwater sounds? This was the subject of research published in the Journal of Herpetology (Dec. 2014). Alligators inhabiting the flood control canals in the Florida Everglades were monitored for movement toward a sound produced from a submerged div- ing bell. Movements within a 180° arc of the direction toward the sound were scored as movements toward the sound; all movements in other directions were scored as movements away from the sound. Consequently, the rescarchers assumed that the proportion of movements toward the sound expected by chance is 180°/360° = 5. In a sample of n = 50 alliga- tors, 42 moved toward the underwater sound. ive the mut heth p Gttener sound is highe than expected by %3! hativ etheses ftesting higatothat eto b.a ahem apan mate mo k undewate Sme the tetstatisue o hisstudy d. Compute the observed significance level (p-value) of the test. C. e. Make the appropriate conclusion in the words of the problem.

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881 Underwater sound-locating ability of alligators. Alligators
have shown the ability to determine the direction of an air-
borne sound. But can they locate underwater sounds? This
was the subject of research published in the Journal of
Herpetology (Dec. 2014). Alligators inhabiting the flood
control canals in the Florida Everglades were monitored for
movement toward a sound produced from a submerged div-
ing bell. Movements within a 180° arc of the direction toward
the sound were scored as movements toward the sound; all
movements in other directions were scored as movements
away from the sound. Consequently, the researchers assumed
that the proportion of movements toward the sound expected
by chance is 180°/360° = 5. In a sample of n = 50 alliga-
tors, 42 moved toward the underwater sound.
ive the mu
heth
wA ueter sound js higner than expected by
hative petheses ftesung
igatothatoeto-
b.a
apan matt
eamunderwate
e the fest tatisue ror isstudy
d. Compute the observed significance level (p-value) of
C.
the test.
e. Make the appropriate conclusion in the words of the
problem.
Transcribed Image Text:881 Underwater sound-locating ability of alligators. Alligators have shown the ability to determine the direction of an air- borne sound. But can they locate underwater sounds? This was the subject of research published in the Journal of Herpetology (Dec. 2014). Alligators inhabiting the flood control canals in the Florida Everglades were monitored for movement toward a sound produced from a submerged div- ing bell. Movements within a 180° arc of the direction toward the sound were scored as movements toward the sound; all movements in other directions were scored as movements away from the sound. Consequently, the researchers assumed that the proportion of movements toward the sound expected by chance is 180°/360° = 5. In a sample of n = 50 alliga- tors, 42 moved toward the underwater sound. ive the mu heth wA ueter sound js higner than expected by hative petheses ftesung igatothatoeto- b.a apan matt eamunderwate e the fest tatisue ror isstudy d. Compute the observed significance level (p-value) of C. the test. e. Make the appropriate conclusion in the words of the problem.
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