Statistics Quiz

What is the purpose of inferential statistics?

• Describe data

• Generalize from sample to population

• Organize data

• Visualize data

Which of the following is a type of inference?

• Conclusive

• Abstract

• Deductive

• Objective

The distribution of sample statistics drawn repeatedly from a population is known as:

• Frequency distribution

• Cumulative distribution

• Sampling distribution

• Normal distribution

The standard deviation of the sampling distribution of the sample mean is called:

• Mean square error

• Standard deviation

• Standard error

• Variance

Which factor reduces the standard error?

• Decreased variation

• Increased standard deviation

• Decreased sample size

• Increased sample size

The null hypothesis (H₀) usually states:

• There is a difference

• The result is significant

• There is no difference

• The sample is biased

What does a p-value represent?

• The confidence level

• The probability of a hypothesis being true

• The probability of obtaining the observed results if H₀ is true

• The size of the effect

A Type I error is:

• Accepting a false null hypothesis

• Rejecting a true null hypothesis

• Accepting a true null hypothesis

• Rejecting a false alternative hypothesis

The probability of committing a Type I error is:

• β

• α

• p

• δ

Which of the following increases statistical power?

• Smaller sample size

• Lower α

• Larger sample size

• Greater standard error