Using Math to Analyze Data

Yusef adds all of the values in his data set and then divides by the number of values in the set. What is Yusef most likely finding?

the mean

A ruler has markings as shown below. Stefan uses this ruler to measure the length of a metal rod. How many decimal places should his answer include?

1

The actual density of iron is 7.874 g/mL. In a laboratory investigation, Jason finds the density of a piece of iron to be 7.921 g/mL. What is the percent error that is associated with Jason's measurement?

4.7%

Thomas records the masses of several rocks as 7.40 g, 7.85 g, 7.60 g, and 7.40 g. What is the mode of Thomas's data set?

7.40

A teacher uses a bow and arrow to demonstrate accuracy and precision. She shoots several arrows, aiming at the exact center of the target each time. The drawing below shows where her arrows hit the target.Which statement best describes her shots?

Her shots were neither accurate nor precise.

How is the mode of a data set defined?

It is the most common value in the set.

Anita is comparing the accepted value for a physical property to the value she measured in the laboratory. Which characteristic of her measured value is Anita most likely trying to evaluate?

accuracy

Francine makes several measurements of the mass of a metal block. The data set is shown in the table below.After analyzing this data set, Francine calculates a value of 20.73 g. Which of the following characteristics has been calculated?

mean

A tree farm sells trees based on height in increments of 10 feet. Which graph would best show the current stock of trees?

scatterplot

Jaime measures the density of a slab of aluminum (Al) metal. What information does Jaime need to evaluate the accuracy of his measurement?

the accepted value for the density of aluminum