scientific methods

Question 1

1. changed by the researcher
2. manipulated variable
3. the cause

Answer 1

independent variable (IV)

ideally should have one IV

Question 2

1. researcher predicts will change if manipulated variable changes
2. responding variable
3. the effect

Answer 2

dependent variable (DV)

Question 3

1. variables that must be held constant to not influence the outcome of the experiment
2. controlled variables

Answer 3

constant or fixed variables

Question 4

a proposition, educated guess and claim that help help answer the problem, operationally defined and can either be confirmed or verified

Answer 4

hypothesis

Question 5

writtem in a declarative sentence, in present tense, and testable

Answer 5

hypothesis

Question 6

types of hypothesis

states that no relationship/difference exists between variables

Answer 6

null hypothesis (H0): statistical hypothesis

no effect in the population

Question 7

states the expected relationship/difference exists between variables

Answer 7

Alternative hypothesis (Ha): research hypothesis

There’s an effect in the population.