We are worried that there could be an omitted variable, namely the percentage of English learners in the school district: it is plausible that the ability to speak, read and write English is an important factor for successful learning. Therefore, students that are still learning English are likely to perform worse on tests than native speakers. Also, it is possible that the share of English-learning students is bigger in school districts where class sizes are relatively large (i.e., the student-to-teacher ratio is high): think of poor urban districts where a lot of immigrants live. Given this information, what is the expected direction of the bias on the coefcient for str.
We are worried that there could be an omitted variable, namely the percentage of English learners in the school district: it is plausible that the ability to speak, read and write English is an important factor for successful learning. Therefore, students that are still learning English are likely to perform worse on tests than native speakers. Also, it is possible that the share of English-learning students is bigger in school districts where class sizes are relatively large (i.e., the student-to-teacher ratio is high): think of poor urban districts where a lot of immigrants live. Given this information, what is the expected direction of the bias on the coefcient for str.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
We are worried that there could be an omitted variable, namely the percentage of English learners in the school district: it is plausible that the ability to speak, read and write English is an important factor for successful learning. Therefore, students that are still learning English are likely to perform worse on tests than native speakers. Also, it is possible that the share of English-learning students is bigger in school districts where class sizes are relatively large (i.e., the student-to-teacher ratio is high): think of poor urban districts where a lot of immigrants live. Given this information, what is the expected direction of the bias on the coefcient for str.
![- regress testscr str
Source
Model
Residual
Total
SS
str
_cons
7794.11004
144315.484
152109.594
df
1
418
419
testscr Coefficient Std. err.
-2.279808 .4798256
698.933 9.467491
MS
7794.11004
345.252353
363.030056
Number of obs
F(1, 418)
Prob > F
R-squared
t P>|t|
=
-4.75 0.000
73.82 0.000
=
=
Adj R-squared =
Root MSE
=
420
22.58
0.0000
0.0512
0.0490
18.581
[95% conf. interval]
-3.22298 -1.336637
680.3231
717.5428](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F873122f1-dead-4804-99db-6d51b7591a67%2F51600c7f-9eeb-43ef-ad17-ae1f5d1e190e%2Fhku3m3_processed.png&w=3840&q=75)
Transcribed Image Text:- regress testscr str
Source
Model
Residual
Total
SS
str
_cons
7794.11004
144315.484
152109.594
df
1
418
419
testscr Coefficient Std. err.
-2.279808 .4798256
698.933 9.467491
MS
7794.11004
345.252353
363.030056
Number of obs
F(1, 418)
Prob > F
R-squared
t P>|t|
=
-4.75 0.000
73.82 0.000
=
=
Adj R-squared =
Root MSE
=
420
22.58
0.0000
0.0512
0.0490
18.581
[95% conf. interval]
-3.22298 -1.336637
680.3231
717.5428
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 3 steps
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman