Measures of Position and Outliers

What does a z-score represent?

• The distance between two data values

• The number of standard deviations a data value is from the mean

• The mean of a data set

• The standard deviation of a data set

How is a z-score calculated?

• Subtracting the mean from the data value and dividing by the standard deviation

• Adding the mean to the data value and multiplying by the standard deviation

• Dividing the data value by the mean and subtracting the standard deviation

• Multiplying the data value by the mean and dividing by the standard deviation

What does the z-score standardize in a distribution?

• The mean and standard deviation

• The quartiles and percentiles

• The outliers and extreme values

• The shape and skewness

What does the 70th percentile represent?

• The value separating the bottom 70% from the top 30%

• The value separating the bottom 30% from the top 70%

• The value separating the bottom 70% from the top 70%

• The value separating the bottom 30% from the top 30%

What is the first quartile equivalent to?

• The 25th percentile

• The 50th percentile

• The 75th percentile

• The median

How many quartiles are there in a data set?

• Two

• Three

• Four

• Five

What is the third quartile equivalent to?

• Median

• 75th percentile

• 99th percentile

• 25th percentile

What is the median of the bottom half of the data called?

• Q1

• Q2

• Q3

• The mean

What is the median of the top half of the data called?

• Q1

• Q2

• Q3

• The mean

Quartiles divide the data set into ______ equal parts.

• 2

• 3

• 4

• 5