ANOVA is a statistical technique used to determine if differences exist between the means of two
populations. - ANSWER-FALSE
ANOVA is a statistical technique used to determine if differences exist between the means of three or
more populations. - ANSWER-TRUE
When using Fisher's least difference...
ISDS COPE Exam Questions| Already
Answered| GRADED A+
ANOVA is a statistical technique used to determine if differences exist between the means of two
populations. - ANSWER-FALSE
ANOVA is a statistical technique used to determine if differences exist between the means of three or
more populations. - ANSWER-TRUE
When using Fisher's least difference (LSD) method at some stated significance level α, the probability of
committing a Type I error increases as the number of pairwise comparisons increases. - ANSWER-TRUE
Fisher's LSD method is applied when the
A. ANOVA test has not rejected the null hypothesis of equal population means.
B. ANOVA test has rejected the null hypothesis of equal population means.
C. two-sample t test is not applicable.
D. None of these choices is correct. - ANSWER-B. ANOVA test has rejected the null hypothesis of equal
population means.
When using Fisher's LSD method at some stated significance level, the probability of committing a Type I
error increases as the number of _________________________.
A. pairwise comparisons decreases
B. pairwise comparisons increases
,C. sample size increases
D. treatments decreases - ANSWER-B. pairwise comparisons increases
Tukey's honestly significant differences (HSD) method ensures that the probability of a Type I error
remains fixed irrespective of the number of ________________.
A. pairwise comparisons
B. treatments
C. replications within each treatment
D. replications for each combination of factor A and factor B - ANSWER-A. pairwise comparisons
If the interaction between two factors is not significant, the next tests to be done are
___________________.
A. none, the analysis is complete
B. none, gather more data
C. tests about the population means of factor A or factor B using two-way ANOVA without interaction
D. Tukey's confidence intervals - ANSWER-C. tests about the population means of factor A or factor B
using two-way ANOVA without interaction
The correlation coefficient can only range between 0 and 1. - ANSWER-FALSE (-1 </= RXY </= 1)
, Simple linear regression includes more than one explanatory variable. - ANSWER-FALSE
A simple linear regression model uses one explanatory variable to explain the variability in the response
variable. - ANSWER-TRUE
Simple linear regression analysis differs from multiple regression analysis in that
A. simple linear regression uses only one explanatory variable
B. the coefficient of correlation is meaningless in simple linear regression
C. goodness-of-fit measures cannot be calculated with simple linear regression
D. the coefficient of determination is always higher in simple linear regression - ANSWER-A. simple
linear regression uses only one explanatory variable
In a simple linear regression model, if the plots on a scatter diagram lie on a straight line, which of the
following is the standard error of the estimate?
A. -1
B. 0
C. +1
D. Infinity - ANSWER-B. 0
In a simple linear regression model, if the plots on a scatter diagram lie on a straight line, which of the
following is the coefficient of determination?
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 lecturervince8. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.47. You're not tied to anything after your purchase.
