Summary of Measures

What is a graphic way of showing a summary of data using the median, quartiles, and extremes of the data?

• Stem-and-Leaf Plot

• Bar Graph

• Box Plot

• Pie Chart

What is the median of the data?

• 200

• 100

• 90

• 140

Use the box-and-whisker plot below to determine which statement is accurate.

• One half of the cholesterol levels are between 180 and 197.5.

• One half of the cholesterol levels are between 180 and 211.

• About 75% of the adults have cholesterol levels less than 180.

• About 25% of the adults have cholesterol levels of at most 211.

If we use the median to measure the typical value or center of the data, we would use the _________ to measure the variability.

• Mode

• MAD

• Standard Deviation

• IQR or Interquartile Range

Which person's dot plot would you expect to have a higher IQR?

• Elena

• Jada

• Lin

Which class period has less variability in their test scores? (least spread out) Approximate the Interquartile Range (IQR) for that class period.

The dot plot represents the distribution of wages earned during a one-week period by 12 college students. What is the median? Interpret this value based on the situation.

• $119; Most students made $119 per week.

• $118; Half of the students earned $118 or less and half of the students earned $118 or more.

• $118; The average weekly wage was $118.

• $119; Some of the students earned less than $119 and some of the students earned more than $119

Which summary statistics should be used to describe the given data?

• the mean and standard deviation

• the mean and IQR

• the median and standard deviation

• the median and IQR

A ________ is a graphical display of the five number summary.

• stemplot

• histogram

• dotplot

• boxplot

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 24 feet. How tall is the building? (Draw a picture, set up a proportion)

• 24 feet

• 21 feet

• 27 feet

• 32 feet