Correlational study
a research project designed to discover the degree to which two variables are
related to each other
Co-variables
The variables investigated within a correlation e.g. height a weight.
Null Hypothesis (H0)
A statement of "no difference."
What two hypotheses do you always make...
Alternate
Null
Alternate Hypothesis (Ha)
there IS a relationship among variables
What must you always remember on a graph
-both axis label
-title
-data plotted correctly
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, Correlational study +/-
+good starting point for research
-doesn't mean cause and effect
Normal distribution
a bell-shaped curve, describing the spread of a characteristic throughout a
population
Characteristics of a normal distribution
Its bell shaped
Its symmetrical
The mean, median, mode are all in the centre
The 2 tails never touch the horizontal axis
Measure of central tendency
Indicates the central or average value in a set of scores.
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, Negative skew
mean, median, mode
Positive skew
mode, median, mean
4 markers in research methods...
do bulleted, distinct steps
has a prescriptive mark scheme
A negative skew suggests something is...
too easy, people are getting average too high results
Descriptive statistic
describes certain characteristics or properties of a batch of numbers
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a research project designed to discover the degree to which two variables are
related to each other
Co-variables
The variables investigated within a correlation e.g. height a weight.
Null Hypothesis (H0)
A statement of "no difference."
What two hypotheses do you always make...
Alternate
Null
Alternate Hypothesis (Ha)
there IS a relationship among variables
What must you always remember on a graph
-both axis label
-title
-data plotted correctly
https://quizlet.com/gb/625154572/flash-cards/?funnelUUID=97372aca-f23d-42cb-b979-bd186a3e3b8f 03/03/2026, 8 49 pm
Page 3 of 19
:
, Correlational study +/-
+good starting point for research
-doesn't mean cause and effect
Normal distribution
a bell-shaped curve, describing the spread of a characteristic throughout a
population
Characteristics of a normal distribution
Its bell shaped
Its symmetrical
The mean, median, mode are all in the centre
The 2 tails never touch the horizontal axis
Measure of central tendency
Indicates the central or average value in a set of scores.
https://quizlet.com/gb/625154572/flash-cards/?funnelUUID=97372aca-f23d-42cb-b979-bd186a3e3b8f 03/03/2026, 8 49 pm
Page 4 of 19
:
, Negative skew
mean, median, mode
Positive skew
mode, median, mean
4 markers in research methods...
do bulleted, distinct steps
has a prescriptive mark scheme
A negative skew suggests something is...
too easy, people are getting average too high results
Descriptive statistic
describes certain characteristics or properties of a batch of numbers
https://quizlet.com/gb/625154572/flash-cards/?funnelUUID=97372aca-f23d-42cb-b979-bd186a3e3b8f 03/03/2026, 8 49 pm
Page 5 of 19
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