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Inferential Statistics MCQ

When an experimenter incorrectly rejects the null hypothesis when it is true it is called Type II error.

True

False

Answer

Correct Answer: False

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When an experimenter incorrectly rejects the null hypothesis when it is true it is called type I error.

True

False

Answer

Correct Answer: True

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Trend is frequently reported when the data_____

Reaches the level of statistical significance

Comes close to the level of statistical significance

Gets far away from the level of statistical significance

All of these

Answer

Correct Answer: Comes close to the level of statistical significance

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Findings are considered statistically significant if the probability that we are wrong is _____

Equal to 0.05

Less than 0.05

More than 0.05

All of these

Answer

Correct Answer: Less than 0.05

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In signal to noise ratio the effect of a treatment is considered the signal and _____ is considered the noise.

Constant numbers

Random variation in numbers

Both

None

Answer

Correct Answer: Random variation in numbers

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Most frequently what the experimenter thinks may be true or wishes to be true before he or she begins an experiment refers to_____

Research hypothesis

Alternative hypothesis

Null hypothesis

Both a and b

Answer

Correct Answer: Both a and b

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The significance level in replication is _____

0.005

0.05

0.5

5.0

Answer

Correct Answer: 0.05

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The science of predicting future events or the likelihood of any given event occurring is known as_____

Significance

Probability

Hypothesis

None of these

Answer

Correct Answer: Probability

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P level is the probability of committing the Type I error, that is, rejecting H0 when H0 is _____

True

Not sure

False

Both a and b

Answer

Correct Answer: True

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Null hypothesis significance testing is a statistical method for testing whether or not _____ variable has an effect on the dependent variable.

Confounding

Response

Continuous

Independent

Answer

Correct Answer: Independent

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All are correct about null hypothesis except_____

The starting point in scientific research

Assumed there is no effect of the treatment

Assumed that there is no relationship between two variables

Assumed to be true before the start of experiment

Answer

Correct Answer: Assumed to be true before the start of experiment

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Findings are considered statistically nonsignificant or not significant if the probability of being wrong is_____

Equal to 0.05

Less than 0.05

More than 0.05

All of these

Answer

Correct Answer: More than 0.05

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In nondirectional hypothesis the _____ hypothesis will be rejected if two groups’ means differ in either direction.

Null

Alternative

Both

None

Answer

Correct Answer: Null

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Insignificant is often erroneously used instead of the correct statistical term not significant or nonsignificant.

True

False

Answer

Correct Answer: True

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Directional alternative hypothesis is also called as_____

One-tailed test of significance

Two-tailed test of significance

Z test

T Test

Answer

Correct Answer: One-tailed test of significance

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Demand characteristics are _____ hints and cues that guide participants to act in accordance with the experimenter’s wishes or expectations.

Subtle

Unconscious

Assured

Both a and b

Answer

Correct Answer: Both a and b

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In a controlled experiment , the parameter of statistical interest is the difference between the two groups’ means on some _____ variable as a function of the independent variable.

Confounding

Descriptive

Dependent

Continuous

Answer

Correct Answer: Dependent

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Beta refers to the probability of_____

Type I error

Type II error

Both

None of these

Answer

Correct Answer: Type II error

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Most frequently, what the experimenter thinks may be true or wishes to be true before beginning an experiment is known as_____

Alternative hypothesis

Research hypothesis

Conformational hypothesis

Both a and b

Answer

Correct Answer: Both a and b

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To consider findings significant, the probability of alpha must be _____

0.5

0.05

Less than 0.05

Greater than 0.05

Answer

Correct Answer: Less than 0.05

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