Using data from 1995 - 2000, a regression equation is found for the weights of caiman in Caroni River based on their body length.Which of the following is/are true about the regression equation?

I) The regression equation should be used to predict the weight of a caiman in 2020

II) The regression equation should be used to predict the weight of caiman in 1999

III) The regression equation should be used to predict the body length of a caiman in 2020

2)

Given the linear correlation coefficientr= - 0.534and the sample size n = 13, find the critical value ofrand state whether the givenrrepresents a significant linear correlation. Use a significance level of alpha = 0.05.

a.Critical value = 0.576; no significant linear correlation

b.Critical value = 0.576; significant linear correlation

c.Critical value = 0.553; significant linear correlation

d.Critical value = 0.553; no significant linear correlation

3)What are the critical values of²containing an area of 0.05 in each tail, at a sample size of 20?

a.²L= 10.851 ²R= 31.410

b.²L= 10.117 ²R= 30.144

c. ²L= 8.907 ²R= 32.852

d. ²L= 9.951 ²R= 34.170