Question

Use the following for question 8 to 10.

Silicon-germanium alloys have been used in certain types of solar cells. Researchers investigated how germanium (Ge) concentration affected the Fermi level position (eV). Assume all observations are independent.

We have the following results.

Simple linear regression results
Dependent Variable : Fermi level
Independent Variable : Ge
Fermi level = 0.721786 - 0.43268475 Ge
Sample size : 13
R (correlation coefficient) = -0.073757327
R-sq = 0.80156604
Estimate of error standard deviation = 0.073757327

Parameter	Estimate	Std Err.	Alternative	DF	T-stat	P-value
Intercept	0.721786	0.04581405	not equal to 0	11	15.753215	<0.0001
Slope	-0.43268475	0.064910296	not equal to 0	11	-6.6658878	<0.0001

Source	DF	SS	MS	F-stat	P-value
Model	1	0.24172765	0.24172765	44.43406	<0.0001
Error	11	0.059841577	0.0054401433
Total	12	0.30156923

8) Based on the above result, is there a statistically significant lieanr association between Ge concentration and Fermi level position?

Select one:

a. Yes

b. No

c. Cannot tell with information provided

9) Assume ?=0.05. Is Ge significant in the linear model to explain Fermi level?

Select one:

True

False

Is Ge significant in the linear model to explain Fermi level?

Select one:

True

False

10) Find the residual if another new data point was observed with a Ge concentration of 0.65 and a Fermi level position of 0.5.

Round your answer to two decimal digits.

Answer 1