ch03.rtf - File Ch03 Chapter 3 Interval Estimation and...

File: Ch03, Chapter 3, Interval Estimation and Hypothesis Testing
1. You estimate a simple linear regression model using a sample of 62 observations and obtain the
following results (estimated standard errors in parentheses below coefficient estimates):
y = 97.25 + 33.74 *x
(3.86) (9.42)
What are the endpoints of the interval estimator for 
2
with a 95% interval estimate?
a.) (14.90, 52.58)
b.) (24.32, 43.16)
c.) (-3.58, 3.58)
d.) (30.16,37.32)
Ans: a
Level: Moderate
Section: 3.1
2. You estimate a simple linear regression model using a sample of 25 observations and obtain the
following results (estimated standard errors in parentheses below coefficient estimates):
y = 97.25 + 19.74* x
(3.86) (3.42)
What are the endpoints of the interval estimator for 
2
with a 98% interval estimate?
c
Level: Moderate
Section: 3.1
3. You estimate a simple linear regression model using a sample of 62 observations and obtain the
following results (estimated standard errors in parentheses below coefficient estimates):
y = 97.25 + 33.74* x
(3.86) (9.42)
You want to test the following hypothesis: H
0
: 
2
= 12, H1: 
2
≠12. If you choose to reject the null
hypothesis based on these results, what is the probability you have committed a Type I error?
2
c
Level: Moderate
Section: 3.2