According to the following summary output which variable is

According to the following summary output, which variable is statistically significant?

SUMMARY OUTPUT

Regression Statistics

Multiple R

0.659438147

R Square

0.43485867

Adjusted R Square

0.32889467

Standard Error

9.933729131

Observations

20

ANOVA

df

SS

MS

F

Significance F

Regression

3

1214.886

404.9621

4.10383406

0.024469

Residual

16

1578.864

98.67897

Total

19

2793.75

Coefficients

Standard Error

t Stat

P-value

Lower 95%

Upper 95%

Lower 95.0%

Upper 95.0%

Intercept

205.5786668

48.45654

4.242537

0.00062079

102.8554

308.3019

102.8554

308.3019

Tire size

-0.199930251

0.208548

-0.95868

0.35198575

-0.64203

0.242173

-0.64203

0.242173

Engine size

2.197090474

0.684005

3.212096

0.005437685

0.747064

3.647117

0.747064

3.647117

FD/RD

3.094858509

4.497636

0.688108

0.501240212

-6.4397

12.62942

-6.4397

12.62942

Tire size

Engine size

FD/RD

None of the above

SUMMARY OUTPUT
Regression Statistics
Multiple R	0.659438147
R Square	0.43485867
Adjusted R Square	0.32889467
Standard Error	9.933729131
Observations	20
ANOVA
	df	SS	MS	F	Significance F
Regression	3	1214.886	404.9621	4.10383406	0.024469
Residual	16	1578.864	98.67897
Total	19	2793.75
	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%	Lower 95.0%	Upper 95.0%
Intercept	205.5786668	48.45654	4.242537	0.00062079	102.8554	308.3019	102.8554	308.3019
Tire size	-0.199930251	0.208548	-0.95868	0.35198575	-0.64203	0.242173	-0.64203	0.242173
Engine size	2.197090474	0.684005	3.212096	0.005437685	0.747064	3.647117	0.747064	3.647117
FD/RD	3.094858509	4.497636	0.688108	0.501240212	-6.4397	12.62942	-6.4397	12.62942
	a)	Tire size
	b)	Engine size
	c)	FD/RD
	d)	None of the above

Solution

Sol) Answer is B

Tire Size:

p value= 0.352 alpha=0.05

p value > alpha, Then this factor is not significant

Engine Size:

p value= 0.0054 alpha=0.05

p value < alpha, Then this factor is significant

FD/RD:

p value= 0.5012 ,alpha=0.05

p value > alpha, Then this factor is not significant