Using Math to Analyze Data

Question 1

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 2

How can one determine the median of a data set?

Revolt · Accepted Answer

by ordering the data points and finding the middle value of the set

Question 3

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 4

Precision can be defined as the

Revolt · Accepted Answer

reproducibility of a measured value.

Question 5

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 6

Error

Question 7

Which quantity is used to generate the error bars on a graph?

Revolt · Accepted Answer

standard deviation

Question 8

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

Revolt · Accepted Answer

accuracy

Question 9

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 10

In an experiment, Theresa measured 15.05 mL of water. She must have used a

Revolt · Accepted Answer

buret that had markings every 0.1 mL.

Using Math to Analyze Data Answers

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