Use the following regression output to answer the following questions 21-25

• Y = Price in $'s for Tracfone service plan
• X1 = No. of minutes in plan
• X2 = No. of service days in plan.

Regression Analysis

R2 0.954

Adjusted R2 0.944

R 0.977

Std. Error 13.321

Regression output confidence interval

coefficient std. 95% 95% variables s error t (df=9) p-value lower upper

Intercept	20.0000 6.8759 2.517	.0329	1.7504 32.8590
X1, minutes	0.1000 0.0092 12.488	5.48E- 07	0.0936 0.1350
X2, days	0.0800 0.0263 2.680	.0252	0.0110 0.1297

Flag question: Question 21Question 214 pts

Select the correct regression equation using the output above.

Group of answer choices

Y = 20 + 0.1*X1 + 0.08*X2

Y = 0.1*X1 + 0.08*X2

Y = 0.08*X1 + 0.1*X2

Y = 20+ 0.08*X1 + 0.1*X2

Flag question: Question 22Question 224 pts

Evaluate the statistical significance of the intercept, X1 (minutes), and X2 (days):

Group of answer choices

Intercept (Significant at 0.05), X1 (Significant at 0.01), X2 (Significant at 0.05)

Intercept (Significant at 0.05), X1 (Significant at 0.05), X2 (Significant at 0.05)

Intercept (Significant at 0.05), X1 (Significant at 0.01), X2 (Significant at 0.01)

Intercept (Significant at 0.05), X1 (Not Significant), X2 (Significant at 0.05)

Flag question: Question 23Question 234 pts

Predict the change in the service plan price if the number of minutes increases by 100.

Group of answer choices

$10

$28

$30

$8

Flag question: Question 24Question 244 pts

Predict the change in the service plan price if the number of days increases by 100.

Group of answer choices

$8

$28

$30

$10

Flag question: Question 25Question 254 pts

Predict the price for a plan which offers 100 minutes and 100 days.

Group of answer choices

$38

$18

$28

$30