121 Feeding habits of fish. Brain and Behavior Evolution

(Apr. 2000) performed a study of the feeding behavior of black-bream fish. Z oologists recorded the number of aggressive strikes of two black-bream fish feeding at the bottom of an aquarium in the 10-minute period following the addition of food. The table listing the weekly number of strikes and the age of the fish (in days) is reproduced below. These data are saved in the BLACKBREAM file.

a. Write the equation of a straight-line model relating number of strikes ( y ) to age of fish ( x ).

b. Fit the model to the data by the method of least squares and give the least squares prediction equation.

c. Give a practical interpretation of the value of b n 0 if possible.

d. Give a practical interpretation of the value of b n 1 if possible.

e. Test H0: b1 = 0 versus Ha: b1 6 0, using a = .10.
Interpret the result.

Transcribed Image Text:

Week Number of Strikes Age of Fish (days) 123456789 85 63 34. 13550 39 155 58 162 35 169 57 12 15 178 184 190 Based on Shand, J., et al. "Variability in the location of the retinal ganglion cell area centralis is correlated with ontogenetic changes in feeding behavior in the Blackbream, Acanthopagrus 'butcher"." Brain and Behavior, Vol. 55, No. 4, Apr. 2000 (Figure H).