Quiz on Norms and Basic Statistics

What are descriptive statistics used for?

• Making inferences

• Providing a concise description of quantitative information

• Creating histograms

• Calculating standard deviations

What is the purpose of inferential statistics?

• To describe data

• To make inferences from a sample to a population

• To calculate the mean

• To create frequency distributions

Which of the following is an example of a nominal scale?

• Shoe colors

• Phone numbers

• IQ scores

• Height measurements

What property does an ordinal scale have?

• All of the above

• Magnitude

• Absolute zero

• Equal intervals

Who is credited with developing statistical theory as a general method of research?

• Francis Galton

• R.A. Fisher

• Quetelet

• W.A. McCall

What does a z-score indicate?

• The average score in a distribution

• How many standard deviations a score is from the mean

• The most frequent score in a distribution

• The middle score in a set of scores

What is the main purpose of a frequency distribution?

• To display scores on a variable

• To calculate the mean

• To determine percentile ranks

• To create histograms

What does the interquartile range measure?

• The range between the first and third quartiles

• The total number of scores

• The highest score in the data set

• The average of the data

What is a criterion-referenced test designed to do?

• Compare individuals with a norm

• Identify specific skills or knowledge

• Measure general intelligence

• Assess physical characteristics

What is the mean of the following set of numbers: 2, 4, 4, 4, 5, 5, 7, 9?

• 7

• 6

• 5

• 4