Answer:
Hello your question has some missing information attached below is the missing information
answer :
i) ( 0.158 , - 1.018 )
ii) the difference in expected earnings can be computed as
(
Step-by-step explanation:
<u>i) Construct a 95% confidence interval ( between Juanita and Molly )</u>
Expected difference in earnings = ( X - X) = = ( )
∴ 95% confidence interval
-0.43 ± 1.96 * 0.30 = [ -0.43 ± 0.588 ] = ( 0.158 , - 1.018 ) ( hence confidence interval at 95% = 1.96 )
ii) <u> Construct a 95% confidence interval ( between Juanita and Jennifer )</u>
Juanita is a student from the south and Jennifer is a student from Midwest
therefore the difference in expected earnings can be computed as
(
therefore a 95% confidence interval can be calculated with the above regression model.