Key Science Skills

Question 1

Hypothesis

Answer 1

Prediction of results
- Must include IV, DV, population and direction

Question 2

Experimental group

Answer 2

Sample that have the IV applied

Question 3

Control group

Answer 3

Sample without IV applied, baseline measurement

Question 4

Extraneous Variables

Answer 4

A variable other then IV that can influence the DV

Question 5

Confounding Variables

Answer 5

An extraneous variable that influences the DV

Question 6

What are the experimental designs?

Answer 6

Between subjects design
Within subjects design
Mixed subjects design

Question 7

Between Subjects Design

Answer 7

controlled group or the experimental group

Question 8

Within Subjects Design

Answer 8

Completes the control group and the experimental group

Question 9

Mixed Subjects Design

Answer 9

Testing before and after the experiment

Question 10

Aim

Answer 10

What you’re trying to achieve

Question 11

IV

Answer 11

What’s changing

Question 12

Dv

Answer 12

What’s being measured

Question 13

Internal Validity

Answer 13

If the investigation investigates what it claims to investigate.

Question 14

Quantitative

Answer 14

Number measurement.
eg. 14

Question 15

Qualitiative

Answer 15

Categorical

Question 16

Mode

Answer 16

Most frequent value

Question 17

Median

Answer 17

The middle number in an ordered set of data

Question 18

Mean

Answer 18

sum of all the values divided by the total number of values

Question 19

Internal Validity

Answer 19

Investigation truly investigates what it claims to

Question 20

External Validity

Answer 20

ability to generalise

Question 21

Range

Answer 21

difference between the highest and lowest values

Question 22

Interquartile range

Answer 22

range of the middle half

Question 23

Standard deviation

Answer 23

average distance from mean

Question 24

Variance

Answer 24

average of squared distances from mean