Question

An experiment consists of three groups (Treatment Group 1, Treatment Group 2, Placebo Group). What test...

An experiment consists of three groups (Treatment Group 1, Treatment Group 2, Placebo Group). What test was MOST likely used?

Repeated Measures T-test

Z-test

Single Sample T-test

ANOVA

The population mean difference for a T-test of Independent Samples is ALWAYS

0

1

equal to the population mean minus the sample mean

can't answer/not enough information

A research study reported a LARGE effect size of .8. What effect size formula was used?

Scheffe

Cohen's D

Tukey

Correlation

.10

.001

.05

.5
Math   Statistics-And-Probability   
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Answer #1

An experiment consists of three groups (Treatment Group 1, Treatment Group 2, Placebo Group). What test was MOST likely used?

Answer :

when we have more than two groups we can use ANOVA test :

her correct answer is ANOVA

## The population mean difference for a T-test of Independent Samples is ALWAYS  

Answer :

The population mean difference for a T-test of Independent Samples is ALWAYS 0

generally we take :

Ho : μ1 -  μ2 = 0 vs

H1: μ1 -  μ2 ≠ 0
  

##

A research study reported a LARGE effect size of .8. What effect size formula was used?

Answer :

Generally we used Cohen's D to calulate effect size .

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