1.5 Experimental Design

Question 1

Definition of dependent variable

Answer 1

the variable affected by the change in the independent variable

Question 2

Definition of independent variable

Answer 2

the variable the researcher changes; what they are testing

Question 3

Definition of control group

Answer 3

standard to which comparisons are made in an experiment

Question 4

Definition of experimental group

Answer 4

group which changes and contains the independent variable.

Question 5

Which graph axis does dependent and independent variables go on

Answer 5

dependent: y-axis
independent: x-axis

Question 6

example of dependent variable when plants treated with fertilizer will grow better than plants without fertilizer because they will have more nutrients for required growth.

Answer 6

plant growth

Question 7

example of independent variable when plants treated with fertilizer will grow better than plants without fertilizer because they will have more nutrients for required growth.

Answer 7

fertilizer

Question 8

example of control group when plants treated with fertilizer will grow better than plants without fertilizer because they will have more nutrients for required growth.

Answer 8

plants without fertilizer

Question 9

example of experimental group when plants treated with fertilizer will grow better than plants without fertilizer because they will have more nutrients for required growth.

Answer 9

plants with fertilizer

Question 10

independent vs dependent

Answer 10

the independent variable is the thing you change while the dependent is what changes because of the independent variable

Question 11

control group vs experimental group

Answer 11

differ only by the independent variable

Question 12

Hypothesis: Ginkgo can be safely used to treat symptoms of dementia caused by Alzheimer disease or multiple strokes.

what is the independent variable, the dependent variable, the control group, and the experimental group?

Answer 12

Independent: Ginkgo treatment
Dependent: Symptoms
Control group: group not receiving Ginkgo (receiving fake pill)
Experimental group: group receiving Ginkgo

Question 13

Bar graph vs Line graph

Answer 13

Bar: independent variable is grouped
Line: independent variable is quantified or numerical data

Question 14

Standard Deviation

Answer 14

statistic that measures the spread/range of a data group
the wider the spread=larger the standard deviation

Question 15

Error Bars

Answer 15

highs and lows of data results
significant difference between data or not