Using Math to Analyze Data

Question 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?

Revolt · Accepted Answer

0.6%

Question 2

Precision can be defined as the

Revolt · Accepted Answer

reproducibility of a measured value.

Question 3

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?

Revolt · Accepted Answer

Her shots were neither accurate nor precise.

Question 4

In an investigation on accuracy and precision, Myriah measures the mass of a 10.00 g piece of metal several times. Her measurements are 9.98 g, 10.02 g, 10.01 g, and 9.99 g. Which statement best describes her results?

Revolt · Accepted Answer

They are both precise and accurate.

Question 5

Error bars on four different data points are shown below.Which of these data points is the most reliable?

Revolt · Accepted Answer

point 3

Question 6

Which graph is used to show change in a given variable when a second variable is changed?

Revolt · Accepted Answer

line graph

Question 7

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

Revolt · Accepted Answer

histogram

Question 8

Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data?

Revolt · Accepted Answer

bar graph

Question 9

Which best describes accuracy?

Revolt · Accepted Answer

the agreement between a measured value and an accepted value

Question 10

Which property of a measurement is best estimated from the percent error?

Revolt · Accepted Answer

accuracy

Using Math to Analyze Data Answers

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