Question

Bighorn sheep are beautiful wild animals found throughout the western United States. Let x be the age of a bighorn sheep (in years), and let y be the mortality rate (percent that die) for this age group. For example, x = 1, y = 14 means that 14% of the bighorn sheep between 1 and 2 years old died. A random sample of Arizona bighorn sheep gave the following information:

x	1	2	3	4	5
y	16.0	18.7	14.4	19.6	20.0

Σx = 15; Σy = 88.7; Σx² = 55; Σy² = 1597.21; Σxy = 275

(a) Draw a scatter diagram.

(b) Find the equation of the least-squares line. (Round your answers to two decimal places.)

ŷ = ______

+ ____ x

(c) Find r. Find the coefficient of determination r². (Round your answers to three decimal places.)

r =	_______
r2 =	_______

(d) Test the claim that the population correlation coefficient is positive at the 1% level of significance. (Round your test statistic to three decimal places.)

t =

Find or estimate P value of test statistic =

Answer 1

answered by: anonymous