Evaluating Scientific Explanations Answers

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

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?

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

Which of the following best specifies the purpose of error bars on a graph?

Precision can be defined as the

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

How can one determine the median of a data set?

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?

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

Jose’s lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error that he made while calibrating the pH meter, Jose’s measurements of the pH of the sodium phosphate solution are 5.4, 5.4, and 5.4. Which statement best describes his results?