Exam (elaborations)
DSIMGTS Finals Reviewer (Canvas) /Questions And Answers
- Module
- DSIMGTS Finals Reviewer
- Institution
- DSIMGTS Finals Reviewer
DSIMGTS Finals Reviewer (Canvas) /Questions And Answers
[Show more]
Content preview
DSIMGTS Finals Reviewer (Canvas) /Questions AndAnswers
Answer :c. Correlation coefficient - Quiz :A measure of the strength of the
relationship between two variables is the
a. Coefficient of determination
b. Standard error of the estimate
c. Correlation coefficient
d. Slop b of the estimated regression line
Answer :b. The F test and the t test may or may not yield the same results -
Quiz :In simple linear regression analysis, which of the following is not true?
a. The relationship between x and y is represented by means of a straight line
b. The F test and the t test may or may not yield the same results
c. The value of F = t2
d. The F test and the t test yield the same results
Answer :a. Decrease by 3,000 units - Quiz :A regression analysis between
demand (y in 1000 units) and price (x in dollars) resulted in the following
equation. y = 9 - 3x. The equation implies that if the price is increased by $1,
the demand is expected to
a. Decrease by 3,000 units
b. Increase by 6 units
c. Decrease by 3 units
d. Decrease by 6,000 units
Answer :b. There is only one dependent variable - Quiz :In regression analysis,
the F test will provide the same conclusion as the t test if
a. The y-intercept is positive
b. There is only one dependent variable
c. There is only one independent variable
d. There is a positive correlation between x and y
Answer :b. None of these answers are correct - Quiz :If there is a very strong
correlation between two variables, then the coefficient of correlation must be
a. Either much larger than 1 or much smaller than 1
b. None of these answers are correct
c. Much smaller than 1, if the correlation is negative
d. Much larger than 1, if the correlation is positive
, Answer :b. There may or may not be any causal relationship between x and y -
Quiz :If two variables, x and y, have a strong linear relationship, then
a. x causes y to happen
b. There may or may not be any causal relationship between x and y
c. y causes x to happen
d. None of these answers are correct
Answer :b. None of these answers are correct - Quiz :If the coefficient of
determination is 0.81, the coefficient of correlation
a. Must be 0.9
b. None of these answers are correct
c. Must be positive
d. Is 0.6561
Answer :b. Coefficient of determination - Quiz :The proportion of the variation
in the dependent variable y that is explained by the estimated regression
equation is measured by the
a. Confidence interval estimate
b. Coefficient of determination
c. Standard error of the estimate
d. Correlation coefficient
Answer :c. Residual - Quiz :The difference between the observed value of the
dependent variable and the value predicted by using the estimated regression
equation is the
a. Variance
b. Standard error
c. Residual
d. Prediction interval
Answer :d. 0.6 - Quiz :If a data set has SST=2000 and SSE=800, then the
coefficient of determination is
a. 0.4
b. 0.5
c. 0.8
d. 0.6
Answer :c. Outlier - Quiz :A data point (observation) that does not fit the
trend shown by the remaining data is called a(n)
a. None of the other answers is correct
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller HELLENAH. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.93. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78600 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now