Question

a,) Computer output for fitting a simple linear model is given below. State the value of the sample slope for the given model. In testing if the slope in the population is different from zero, identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model.

Coefficients:	Estimate	Std.Error	t value	Pr(>|t|)
(Intercept)	7.395	1.185	6.24	0.000
Dose	-0.4922	0.2781	-1.77	0.087

Sample slope:
p-value:

Is the model effective?

b.) Computer output for fitting a simple linear model is given below. State the value of the sample slope for the given model. In testing if the slope in the population is different from zero, identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model.

Coefficients:	Estimate	Std.Error	t value	Pr(>|t|)
(Intercept)	807.14	86.79	9.30	0.000
A	-3.602	1.181	-3.05	0.006

Sample slope:
p-value:

Is the model effective?

c.) Find a 95% confidence interval for the slope of the model below with n=30.

Coefficients:	Estimate	Std.Error	t value	Pr(>|t|)
(Intercept)	7.454	1.195	6.24	0.000
Dose	-0.2165	0.1223	-1.77	0.087

Round your answers to three decimal places.

Answer 1