Give reasons for 5 stars! Animals living in both air and water exist in a fluid

Question

Give reasons for 5 stars!

Animals living in both air and water exist in a fluid medium, where motion of the fluid is a characteristic property of the environment. Blue crabs have maximum sensory detection when facing current, as shown in the left crab photo below, however, crab orientation to flow also affects the hydrodynamic forces they experience. The graph on the right shows the drag acting on crabs placed at different angles to the flow (y = -0.007x + 1.1; r2 = 0.84; p < 0.001). Answer the following questions:

5. What is this type of statistical analysis called?

A) correlation

B) regression

C) chi-square

D) ANOVA

6. Which of the following is NOT an assumption of this type of analysis?

A) variances are equal

B) data are normally distributed

C) data are independent

D) none of the above

7. If the null hypothesis tested by this analysis were true, the line describing the relationship between crab angle and drag in the associated graph would be __________.

A) vertical

B) increasing at 45 degrees

C) horizontal

D) decreasing at 45 degrees

8. The value of -0.007 represents what in this example?

A) slope

B) intercept

C) independent variable

D) dependent variable

Explanation / Answer

B) regression.

B) data are normally distributed.

B) increasing at 45 degrees.

A) slope

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