Term 1 of 164
When drawing a sample from a population, the goal is for the sample to:
independent of each other
reduce the standard error of the mean
judgement sampling
match the targeted population
Term 2 of 164
In order to use the output from a multiple regression model to perform the ANOVA test on the
difference among the means of four populations, how many dummy variables do we need to
use to indicate treatments?
normal
three
-2;2
R^2
Term 3 of 164
We can reduce the margin of error in an interval estimate of p by doing any of the following
except:
sampling distribution of pbar
overall significance
increasing the planning value p* to .5.
best-subsets regression
,Term 4 of 164
In multiple regression analysis:
there can be several independent variables, but only one dependent variable.
normally distributed
reduce the standard error of the mean
as the values of x get larger, the ability to predict y becomes less accurate.
Term 5 of 164
The effect of two independent variables acting together is called:
regression model
t distribution
sample mean
interaction
Term 6 of 164
The term in the multiple regression model that accounts for the variability in y that cannot be
explained by the linear effect of the p independent variables is the:
error term, ε
multicollinearity
t distribution
good predictors
,Term 7 of 164
In best-subsets regression, Minitab can be used to provide output that identifies the two best
one-variable estimated regression equations, the two best two-variable estimated regression
equations, the two best three-variable estimated regression equations, and so on. What
criterion is used in determining which estimated regression equations are best?
R^2
zero
n-2
n-1
Term 8 of 164
When constructing a confidence or a prediction interval to quantify the relationship between
two quantitative variables, what distribution do confidence and prediction intervals follow?
t distribution
prediction interval
t distribution with 29 degrees of freedom.
do not reject H0
Term 9 of 164
If the value of y in time period t is related to its value in time period t - 1, we say that:
unlikely as that provided by the sample.
standard error of the mean decreases
first-order autocorrelation is present
sample statistic
, Term 10 of 164
When computing the sample size needed to estimate a proportion within a given margin of
error for a specific confidence level, what planning value of p should be used when no
estimate of p is available?
confidence interval
The numerator degrees of freedom equals the number of predictors added to the
model. The denominator degrees of freedom is n—p—1.
t distribution
.5
Term 11 of 164
For a fixed confidence level and population standard deviation, if we would like to cut our
margin of error to 1/3 of the original size, we should take a sample size that is:
using .95 as an estimate
first-order autocorrelation is present
nine times as large as the original sample size.
1/y as the dependent variable instead of y.
Term 12 of 164
Which of the following statements about the backward elimination procedure is false?
at least as small as that provided by the sample.
it begins with zero independent variables
can be either positive or negative
the same for all values of x1, x2,..., xp.
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 or Stuvia-credit 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 codersimon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.00. You're not tied to anything after your purchase.
