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T Test for Independent Groups MCQ

1. A test to determine whether there are significant differences between two independent groups’ means on the same dependent variable is known as _____

T test

Z test

ANOVA

Chi-square test

Answer

Correct Answer: T test

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2. Robustness is characteristic of statistical tests that indicates_____

The ability to detect a real difference between the two groups’ means

The ability to detect a false null hypothesis

The ability to detect whether a treatment or procedure really works

Both a and b

Answer

Correct Answer: Both a and b

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3. The power of a test is estimated by _____

1 – β

β-1

0-β

Answer

Correct Answer: 1 – β

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4. The standard for minimum power in psychological research is_____

8.0

0.80

0.08

Answer

Correct Answer: 0.80

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5. Power is the probability that the null hypothesis will be _____

Accepted correctly

Accepted falsely

Rejected correctly

Rejected falsely

Answer

Correct Answer: Rejected correctly

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6. The _____ t test formula contains the pooled variance estimate.

Numerator of dependent

Numerator of independent

Denominator of dependent

Denominator of independent

Answer

Correct Answer: Denominator of independent

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7. A significant value of F in Levene’s test indicates that the two groups’ variances are significantly different from each other.

True

False

Answer

Correct Answer: True

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8. Independent Groups t Test is a statistical procedure designed to evaluate the difference between two groups’ means on a _____ variable.

Dependent

Response

Independent

Both a and b

Answer

Correct Answer: Both a and b

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9. In situ Design occurs often in t-test designs and ANOVAs where the participants are randomly assigned to the groups.

True

False

Answer

Correct Answer: False

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10. An assumption in the independent groups t test and ANOVA that the two groups or more groups have equal or approximately equal variances is known as_____

Heterogeneity of Variance

Pooled Variance

Homogeneity of variance

None of these

Answer

Correct Answer: Homogeneity of variance

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11. Heterogeneity of Variance is a violation of the assumption that two groups have _____ variances in the independent groups t test.

Equal

Approximately equal

Unequal

Both a and b

Answer

Correct Answer: Both a and b

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12. Effect sizes are typically reported as_____

Small

Medium

Large

All of these

Answer

Correct Answer: All of these

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13. In Controlled Experiment, placebo is given to_____

Experimental group

Controlled group

Both of these

None of these

Answer

Correct Answer: Controlled group

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14. In Controlled Experiment an experimental group that receives some treatment is _____ variable

Dependent

Response

Independent

All of these

Answer

Correct Answer: Independent

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15. The value of Cohen’s d can be _____

Equal to 1.00

Equal to 10.0

Greater than 1.00

Smaller than 1.00

Answer

Correct Answer: Greater than 1.00

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16. Correlation coefficient of effect size yields estimates that is _____ if used with large sample sizes.

Greater than Cohen’s d

Smaller than Cohen’s d

Equal to Cohen’s d

All of these

Answer

Correct Answer: Smaller than Cohen’s d

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