GCSE Statistics Key Vocabulary (FULL) Verified Answers
Binomial Distribution ️️Probability of obtaining a specific number of successes out of a given
number of trials.
Bivariate Data ️️Data sets with two variables.
Categorical Data ️️Data that has already been put in to categori...
Binomial Distribution ✔️✔️Probability of obtaining a specific number of successes out of a given
number of trials.
Bivariate Data ✔️✔️Data sets with two variables.
Categorical Data ✔️✔️Data that has already been put in to categories or classified in some way.
Causality ✔️✔️The relationship between an event and a second event.
Census ✔️✔️Every member of the population is included in the investigation.
Choropleth Map ✔️✔️Map or diagram where different areas have different shading to represent
distribution.
Class Width ✔️✔️The difference between the upper and lower values of a group.
Closed Question ✔️✔️A question with a specific answer that can be chosen from a list.
Cluster Sampling ✔️✔️You include in your investigation one (or more) of the exisiting groups within a
population.
Comparative Pie Chart ✔️✔️Two or more pie charts used to compare sets of data. The total area of
each pie chart is in proportion to the total frequency.
Continuous Data ✔️✔️Data that can take any value (depending on your degree of accuracy). E.g. time,
weight, length
, Control Group ✔️✔️A comparison group in an experiment which has been matched as closely as
possible with the experimental group (e.g. similar age etc)
Convenience Sampling ✔️✔️You choose the easiest data to access / easiest people to select without
need to number or order a sample frame.
Correlation ✔️✔️Measure of relationship between two variables.
Cumulative Frequency ✔️✔️Frequency found by adding each frequency to all the preceding
frequencies (a running total).
Data ✔️✔️Factual information collected for analysis.
Discrete Data ✔️✔️Data that has specific values - cannot have in-between values. E.g the number of
cars in a car park.
Double Mean Point ✔️✔️The value on a scatter graph where your x coordinate is the mean of all your
x values and your y coordinate is the mean of all your y values.
Extrapolation ✔️✔️Obtaining a prediction/estimate from outside your given data.
Frequency ✔️✔️How often something occurs.
Frequency Density ✔️✔️Frequency divided by class width.
Independent Events ✔️✔️The outcome of the first event does not affect the probability of the second.
Index Number (Different to Maths definition) ✔️✔️Percentage in relation to a base value. Given by
the formula: (Value / base value) x 100
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