reading quiz 15

Question 1

What are three characteristics of the sampling distribution of F?

Answer 1

• It is always a positive value.
• It is positively skewed.
• Its median value is approximately 1.

Question 2

Which is represented by the following?

µ1 = µ2 = µ3 = … = µk

Answer 2

The null hypothesis for a one-way analysis of variance.

Question 3

Which of the following is true?

Reject H0 when Fobt ≥ Fcrit.

Reject H0 when Fobt ≤ Fcrit.

Reject H0 when Fobt ≤ dfbetween.

Reject H0 when p > α.

Answer 3

Reject H0 when Fobt ≥ Fcrit.

Question 4

Fobt = _______________________________.

Answer 4

MSbetween/MSwithin

Question 5

You are designing an experiment that will use a one-way ANOVA. Your independent variable is Time of Day and includes the following three categories: morning, afternoon, and evening. In statistical terminology, these three categories are known as ______.

Answer 5

levels

Question 6

You are designing an experiment that will use of a one-way ANOVA. Your independent variable is Time of Day and includes the following three categories: morning, afternoon, and evening. In statistical terminology, Time of Day is known as a ________________.

Answer 6

factor

Question 7

The formula to calculate dfwithin is ______________.

Answer 7

N - k

Question 8

true or false

A significant F test (i.e., Fobt ≥ Fcrit) provides sufficient information to identify which group(s) differed from the others.

Answer 8

False

Question 9

_________ is a relatively unbiased estimate of an ANOVA’s effect size.

Answer 9

Omega squared

Question 10

In an ANOVA, an increase in within-group variability will _________ power.

Answer 10

decrease