Unit 4 12B: Scientific evidence

Question 1

Qualitative data

Answer 1

Data that is descriptive (not numeric)

Question 2

Continuous Data

Answer 2

Data that is measurable and continuous, with infinite possible values; best represented by a line graph

Question 2

Quantitative data

Answer 2

Data that is measured and represented numerically

Question 3

Discrete Data

Answer 3

Data that is countable and in discrete categories; contains distinct or separate values; best represented by a bar graph

Question 3

Accuracy

Answer 3

How close a measurement is to the true value of the quantity being measured

Question 4

True value

Answer 4

The value that could be obtained if the quantity could be measured perfectly

Question 5

Systematic error

Answer 5

When the readings obtained from measurements differ from the true value consistently in one direction every time

Question 6

S

Random error

Answer 6

An unpredictable variation in the readings obtined, due to variables not all being controlled and results in the readings being higher or lower than expected

Question 7

Outlier

Answer 7

A reading that is very different from other results obtained for the same measurement

Question 8

Precision

Answer 8

How close all the measurements are to each other