As Part of a Study of the Swimming Speed of Sharks

question 15

Multiple Choice

As part of a study of the swimming speed of sharks, a random sample of 18 lemon sharks (Triakis semifasciata) were observed in a laboratory sea tunnel. Body lengths and maximum sustainable swimming speeds ("MSSS," reported in body lengths per second) were measured for each shark. The computer output from a regression with y = MSSS and x = body length is given below. ​
Linear Fit MSSS=1.8928955-0.0104278 * Length
Summary of Fit
RSquare 0.526395
RSquare Adj 0.496794
S 0) 272031
Mean of Response 1.24
N Observations 18
​
Analysis of Variance
Source DF Sum of Squares Mean Square F Ratio
Model 1 1.3159870 1.31599 17.7834
Error 16 1.1840130 0.07400 Prob > F
Total 17 2.5000000 0.0007*
​
Parameter Estimates
Term Estimate Std Error t Ratio Prob > |t|
Intercept 1.8928955 0.167575 11.30 < 0.0001*
Length(cm) -0.010428 0.002473 -4.22 0.0007*
​
According to the above computer output, if body length increases by one unit, by how much will the swimming speed, in body lengths per second, change?
​

• A)1.893
• B)-0.0104
• C)-1.893
• D)1.184
• E)-4.22

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Definitions:

Complex Tones

Sounds that consist of multiple frequencies or harmonics, contributing to the perception of musical timbre and speech sounds.

Musical Instruments

Musical instruments are devices designed to produce musical sounds, ranging from simple flutes and drums to complex electronic synthesizers and digital pianos.

Human Speech Sounds

The auditory elements of language produced by the vocal tract, crucial for verbal communication.

Pure Tones

Sound waves characterized by a single frequency, typically used in auditory research and hearing tests to evaluate auditory processing and health.