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Chapter 12: Q. 5 (page 760)

Prey attracts predators Refer to Exercise 3. Computer output from the least-squares regression analysis on the perch data is shown below.

The model for regression inference has three parameters: 伪,尾and 蟽. Explain what each parameter represents in context. Then provide an estimate for each.

Short Answer

Expert verified

Three parameters of the regression inference model were found to be:

伪=0.12049

尾=0.008569

蟽=0.1886

Step by step solution

01

Given Information

Computer output from the least-squares regression analysis on the perch data is shown below.

02

Explanation

The y-intercept, or estimate of the fraction of fish killed when the tank contains no fish, is 伪. The estimate of 伪is given in the "Coef" column and the "Constant" row:

伪=0.12049.

The slope is defined as the predicted proportion of fish destroyed per fish in the tank. The estimate of 尾is given in the "Coef" column and the "Perch" row:

尾=0.008569.

The fraction of fish killed around the population regression line has a standard deviation of 蟽.

蟽=0.1886

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Most popular questions from this chapter

A Harris Poll found that 54%of American adults don鈥檛 think that human beings developed from earlier species. The poll鈥檚 margin of error for 95%confidence was 3%. This means that ,

(a) There is a 95%chance that the interval (51%,57%) contains the true percent of American adults who do not think that human beings developed from earlier species.

(b) The poll used a method that provides an estimate within 3%of the truth about the population 95%of the time.

(c) If Harris takes another poll using the same method, the results of the second poll will lie between 51%and 57%.

(d) Harris should have surveyed more people so that the margin of error would be 0%instead of 3%.

(e) The poll used a method that would result in an interval that contains 54%in 95%of all possible samples of the same size from this population.

Random assignment is part of a well-designed comparative experiment because

(a) It is more fair to the subjects.

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(d) It helps eliminate any possibility of bias in the experiment.

(e) It prevents the placebo effect from occurring

6. Beer and BAC Refer to Exercise 4. Computer output from the least-squares regression analysis on the beer and blood alcohol data is shown below.


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