Reliability Variation Accuracy of Samples

To ensure results are reliable the experiment should be

• Done once

• Repeated

• Done as exactly the same as the method outlines

• Repeated if necessary

A reliable experiment produces results which

• are consistent

• vary greatly

• are different from sample answers

• are not consistent

Results collected from repeat trials of an experiment should be

• averaged

• graphed

• added up

• subtracted

According to the author a test is reliable if...

• The test measures what is supposed to measure.

• the test is neither too long nor too difficult.

• the test does not have any content that wasn't taught specifically in the classroom.

• if students get similar scores on the test regardless of the day when they take it.

Tags

CCSS.RI. 9-10.6

CCSS.RI.11-12.6

CCSS.RI.8.6

CCSS.RI.8.9

CCSS.RL.9-10.6

Keeping controlled variables the same increases:

• Accuracy

• Validity

• Reliability

• Relevance

Using good equipment and good techniques increases:

• Accuracy

• Validity

• Reliability

• Relevance

Which of these is an accuracy technique:

• Holding the ruler upright with a clamp stand

• Keeping the surface the ball is bounced on the same

• Keeping the type of ball used the same

• Doing 4 trials for each drop height

Reliability is improved by:

• Doing more repeats

• Keeping control variables the same

• Using accurate equipment and techniques

Which of these increases Reliability:

• Using a ruler that measures down to mm

• Reading the ruler at eye level

• Repeating the experiment 4 times

• Dropping the ball on a flat surface

This is an example of...

• Reliability but not accuracy

• Accuracy but not Reliability

• Neither Accuracy nor Reliability

• Accuracy and Reliability