Statistics 1060 Exam 2
(Multiple Choice)
Comprehensive Questions
with Complete Solutions
Graded A+ (100% Certified)
[Document subtitle]
Your Exam Plug
,Contact for
further assistance
1. For a given sample size (n), higher confidence level (C) means a
smaller margin of error (ME)? Answer: False; higher confidence level means
LARGER margin of error.
2. For a specified confidence level (C), larger sample (n) provides
smaller mar- gins of error (ME)? Answer: True
3. For a given confidence level (C), a sample (n) 9 times as larger will
make a margin of error (ME) one-third as big? Answer: True; think
square root
4. For a fixed margin of error (ME),larger sample proportions (p)
provide wider confidence intervals? Answer: False
5. What is the correlation coefficient (r) used for? Answer: Used to measure the
strength and direction of a linear relationship between variables.
6. If the correlation coefficient is positive, then... Answer: The regression
model will have a positive slope.
7. You have carried out a regression analysis; but, after thinking
about the rela- tionship between variables, you have decided you
must swap the explanatory and the response variables. After
refitting the regression model to the data, you expect that... Answer: The
value of SSE will change.
8. In regression if SSE=200 and SSR=300, then the coefficient of
determination is Answer: Answer: 0.6000
9. The approximate normality of the sampling distribution becomes
2/
13
(Multiple Choice)
Comprehensive Questions
with Complete Solutions
Graded A+ (100% Certified)
[Document subtitle]
Your Exam Plug
,Contact for
further assistance
1. For a given sample size (n), higher confidence level (C) means a
smaller margin of error (ME)? Answer: False; higher confidence level means
LARGER margin of error.
2. For a specified confidence level (C), larger sample (n) provides
smaller mar- gins of error (ME)? Answer: True
3. For a given confidence level (C), a sample (n) 9 times as larger will
make a margin of error (ME) one-third as big? Answer: True; think
square root
4. For a fixed margin of error (ME),larger sample proportions (p)
provide wider confidence intervals? Answer: False
5. What is the correlation coefficient (r) used for? Answer: Used to measure the
strength and direction of a linear relationship between variables.
6. If the correlation coefficient is positive, then... Answer: The regression
model will have a positive slope.
7. You have carried out a regression analysis; but, after thinking
about the rela- tionship between variables, you have decided you
must swap the explanatory and the response variables. After
refitting the regression model to the data, you expect that... Answer: The
value of SSE will change.
8. In regression if SSE=200 and SSR=300, then the coefficient of
determination is Answer: Answer: 0.6000
9. The approximate normality of the sampling distribution becomes
2/
13
