A Table of Intermediate Calculations
Individual(i)	xi	xix	(xix)	yi	yiy	(yiy)2(yiy)2	(xix)(yiy)	y^(xi)y^(xi)	ii	i2i2
1	6.868			6.8
2	12.718			7.9
3	20.895			11.6
4	31.044			12.3
5	14.673			10.8
Total		---			---			---	---

• Calculate the mean trunk fat.

x=

• Calculate the trunk fat variance.

sx2=

• Calculate the standard deviation of the trunk fat.

sx=

• Calculate the mean insulin units.

y=

• Calculate the insulin unit variance.

sy2=

• Calculate the standard deviation of the insulin units.

sy=

• Calculate the covariation between the trunk fat and the insulin units.

COV(x, y)=

• Calculate the correlation between the trunk fat and the insulin units.

r=

• What is the strength of the linear association (strong, weak)?

The linear association is .

• Calculate the slope of the linear regression model.

b=

• Calculate the vertical coordinate of the y-intercept of the regression model.

a=

• Write the linear regression model.

y^(x)=

• Calculate the residual standard error.

=

• In one sentence, explain why the linear regression model is the best linear model.