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# Statistics MCQ

### Effect size is measure of the magnitude of difference between ____ groups, usually calculated as Cohen’s d

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### In which mean is used to compare a sample mean in one sample z test?

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### The sampling distribution is a distribution of ______ means based on random ______ of a fixed size from a ______.

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### A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is known is the ______.

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### What is the critical value?

Correct Answer: The inner edge of the region of rejection

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### What is the standard error of the mean for a distribution of scores where standard deviation for the population = 24 and the size of the sample = 144?

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### If the obtained value is higher than the critical value, we ______.

Correct Answer: Accept the null hypothesis

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### When can the z-test be used in statistical hypothesis testing?

Correct Answer: When the raw score population’s standard deviation is known

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### The standard error of the mean will always be ______ the standard deviation for a distribution of individual scores.

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### What is the standard error of the mean for a distribution of scores where the standard deviation for the population = 15 and the size of the sample = 100?

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### What is the purpose of the critical value?

Correct Answer: To determine the size of the region of rejection

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