PARAMETRIC Pt.2

Question 1

Used to test claims involving three or more means

Answer 1

ANOVA

Question 2

More superior compared to T-Test

Answer 2

ANOVA

Question 3

ANOVA

Answer 3

ONE-WAY ANALYSIS OF VARIANCE

Question 4

Advantages of using ANOVA compared to T-Test: When you are comparing two means at a time, the rest of the means under study are ignored. With the _____, all the means are compared simultaneously.

Answer 4

F test

Question 5

Advantages of using ANOVA compared to T-Test: When you are comparing two means at a time and making all pairwise comparisons, the probability of rejecting the null hypothesis when it is true is ________, since the more t tests that are conducted, the greater is the likelihood of getting significant differences by chance alone.

Answer 5

increased

Question 6

Advantages of using ANOVA compared to T-Test: The more means there are to compare, the more ______ are needed.

Answer 6

t-tests

Question 7

when an F-test is used to test a hypothesis concerning the means of 3 or more populations

Answer 7

Analysis of Variance

Question 8

sample sizes need not to be equal

Answer 8

Analysis of Variance

Question 9

2 ESTIMATES OF ANOVA

Answer 9

Between-group Variance
Within-group Variance

Question 10

finding variance of the means

Answer 10

Between-group Variance

Question 11

finding the variance for all data

Answer 11

Within-group Variance

Question 12

If there is no difference in the means, the between-group variance estimate will be approximately equal to the within-group variance estimate, and the F-test value will be approximately equal to _____. The null hypothesis will not be rejected.

Answer 12

one

Question 13

when the means differ significantly, the between-group variance will be much _______ than the within-group variance; the F-test value will be significantly greater than one; and the null hypothesis will be ________.

Answer 13

larger/ rejected

Question 14

The degrees of freedom for this F-test is (Numerator)
d.f.N = _______, where k is the number of groups

Answer 14

k – 1

Question 15

(Denominator) d.f.D = ______, where N is the sum of the sample sizes of the groups

Answer 15

N – k

Question 16

ANOVA: ______ is always positive and always right-tailed

Answer 16

F-Test

Question 17

PERFORMING POST-HOC TESTS
→ Comes from the Latin word, meaning

Answer 17

“after this”

Question 18

Commonly used tests to locate where the significant differences in the means lie after the ANOVA procedure has been performed

Answer 18

POST-HOC TESTS

Question 19

2 TYPES OF POST-HOC TESTS

Answer 19

• Scheffe or Scheffe’s Test
• Tukey Test or Tukey HSD

Question 20

When null hypothesis has been rejected, ________ is performed to determine which of the means have a significant difference

Answer 20

Post-Hoc

Question 21

POST HOC:

• can be used when samples are of different sizes
• can be used to make pairwise comparisons (sample 1 + sample 2 VS sample 3)

Answer 21

Scheffe Test

Question 22

POST HOC:

• when samples are equal in size
• narrower confidence limit
• more powerful than the Scheffe test for making pairwise comparisons for the mean

Answer 22

Tukey

Question 23

WHAT TYPE OF ANOVA MUST BE USED?

Independent: − Soil type
Dependent: − Plant growth

Answer 23

ONE-WAY ANOVA

Question 24

WHAT TYPE OF ANOVA MUST BE USED?

Independent: − Soil type − Plant food
Dependent: − Plant growth

Answer 24

TWO-WAY ANOVA

Question 25

ANOVA has
____________ – has interaction effect

Answer 25

With replication

Question 26

ANOVA has
_______________ – also has two independent
variables but no interaction

Answer 26

• Without replication