Statistics Chapter 3 Quiz

What is the mean of a data set?

• The middle value when data is ordered

• The most frequently occurring value

• The sum of all values divided by the number of values

• The difference between the highest and lowest values

What is the median of a data set?

• The middle value when data is ordered

• The most frequently occurring value

• The average of all values

• The largest value in the data set

What is the mode of a data set?

• The number that appears most frequently

• The middle value when data is ordered

• The average of all values

• The difference between the highest and lowest values

Which measure of center is most affected by outliers?

• Mean

• Median

• Mode

Which measure of center is best for skewed data?

• Mean

• Median

• Mode

• Range

What does a negatively skewed (left-skewed) distribution mean?

• The mean is greater than the median

• The mean and median are equal

• The mean is less than the median

• The distribution is symmetrical

What does a positively skewed (right-skewed) distribution mean?

• The mean is greater than the median

• The mean and median are equal

• The mean is less than the median

• The distribution is symmetrical

What is the range of a data set?

• The average of the values

• The middle value in an ordered list

What does standard deviation measure?

• The difference between the highest and lowest values

• The amount of variation in a data set

• The middle value of the data set

• The most common value in the data set

What is the interquartile range (IQR)?

• Q3 - Q1

• The range of the entire data set

• The median

• The mode