Statistical Terms Practice Test (A2-C1) — Vocabulary Exercises with Answers

⏱ Time: 10:00 📝 Questions: 20 📊 Level: A2, B1, B2, C1 📚 Type: Vocabulary ⭐ XP: up to +25 (on pass)
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Work towards mastering Statistical Terms with this focused set of 20 exercises. Designed for Level A2-C1, the questions test recognition, meaning, and natural use. Earn XP, track your score, and come back until you can get them all right.

⏱ You have 10:00 to answer 20 questions. The timer only starts when you click Begin.

Q1  20
Q1 20

Question 1: The ___ shows the most common value in the data.

Question 1 options
'Average' is a general word for a typical value. 'Mode' specifically means the most common or most frequently occurring value in a data set. 'Total' means the sum, and 'range' means the difference between the highest and lowest values.
Q2 20

Question 2: What does 'average' mean in statistics?

Question 2 options
'Average' refers to a typical or central value of a set of numbers, most commonly calculated by adding all values and dividing by the count. It does not mean the highest value, the total count, or the difference between values.
Q3 20

Question 3: In statistics, the word 'sample' means a small group taken from a larger group to study.

Question 3 options
True. A 'sample' is a subset of a population selected for analysis. It represents the larger group without examining every member.
Q4 20

Question 4: We need to ___ the data before we can study it.

Question 4 options
'Collect' means to gather information together. In statistics, you must collect data before analysis. 'Predict' means to guess the future, 'compare' means to look at differences, and 'reduce' means to make smaller.
Q5 20

Question 5: Which word is closest in meaning to 'chart'?

Question 5 options
'Graph' is closest in meaning to 'chart' because both refer to visual representations of data. A 'formula' is a mathematical expression, a 'survey' is a method of data collection, and a 'variable' is a quantity that can change.
Q6 20

Question 6: The ___ of the data set is found by arranging all values in order and selecting the middle one.

Question 6 options
'Median' is the middle value when data is arranged in order. 'Mean' is the arithmetic average, 'mode' is the most frequent value, and 'range' is the difference between the highest and lowest values.
Q7 20

Question 7: Match each statistical term to its definition.

Question 7 options
population
variable
frequency
outlier
a characteristic that can take different values
how often a particular value occurs
a data point far from most other values
the entire group being studied

Select an item on the left, then tap its match on the right.

'Population' is the entire group being studied. 'Variable' is a characteristic that can take different values. 'Frequency' is how often a value appears. 'Outlier' is a value far from most others.
Q8 20

Question 8: A pie ___ is a circular diagram that shows how parts relate to the whole.

Question 8 options
'Chart' naturally collocates with 'pie' to form 'pie chart,' a common type of circular statistical diagram. 'Pie graph,' 'pie table,' and 'pie plot' are not standard collocations.
Q9 20

Question 9: The researcher measured the ___ between students' study hours and their exam scores.

Question 9 options
'Correlation' refers to a statistical relationship between two variables. 'Distribution' describes how values are spread, 'deviation' measures distance from the mean, and 'probability' measures the likelihood of an event.
Q10 20

Question 10: What does 'distribution' mean in a statistical context?

Question 10 options
'Distribution' in statistics describes how data values are spread or arranged across possible values. It does not mean the act of giving out items, a single number summary, or a prediction tool.
Q11 20

Question 11: In statistics, the term 'bias' refers to a systematic error that favours certain outcomes over others.

Question 11 options
True. 'Bias' in statistics means a systematic tendency that causes results to deviate from the true value in a consistent direction, rather than being random.
Q12 20

Question 12: Standard ___ measures how spread out the values in a data set are from the mean.

Question 12 options
'Deviation' collocates with 'standard' to form 'standard deviation,' a key measure of data spread. 'Error,' 'difference,' and 'variance' do not form this specific fixed term with 'standard.'
Q13 20

Question 13: The ___ was designed to test whether the new drug had a measurable effect on recovery time.

Question 13 options
'Experiment' refers to a controlled procedure designed to test a hypothesis. 'Statistic' is a numerical summary, 'parameter' is a population characteristic, and 'percentile' is a ranking measure.
Q14 20

Question 14: Which word is closest in meaning to 'estimate'?

Question 14 options
'Approximate' is closest in meaning to 'estimate' because both involve calculating a value that is close to but not exact. 'Confirm' means to verify, 'determine' means to find exactly, and 'classify' means to sort into categories.
Q15 20

Question 15: The p-value indicates the ___ that the observed results occurred by chance alone.

Question 15 options
'Probability' is the correct term describing the likelihood of an event. A p-value specifically measures the probability of obtaining results as extreme as those observed, assuming the null hypothesis is true. 'Frequency' counts occurrences, 'magnitude' measures size, and 'validity' measures accuracy of a test.
Q16 20

Question 16: The analyst performed a ___ analysis to determine which independent variables best predicted sales.

Question 16 options
'Regression' analysis is a statistical method used to examine the relationship between dependent and independent variables for prediction. 'Cluster' analysis groups similar items, 'factor' analysis identifies underlying dimensions, and 'survival' analysis studies time-to-event data.
Q17 20

Question 17: A researcher who confuses 'correlation' with 'causation' mistakenly believes that ___.

Question 17 options
Confusing correlation with causation means wrongly assuming that because two variables move together, one must cause the other. Correlation only indicates a relationship, not a cause-and-effect link.
Q18 20

Question 18: A confidence ___ gives a range of values within which the true population parameter is likely to fall.

Question 18 options
'Interval' completes the fixed statistical expression 'confidence interval,' which defines a range of plausible values for a population parameter based on sample data.
Q19 20

Question 19: In inferential statistics, the null ___ states that there is no significant effect or difference.

Question 19 options
'Hypothesis' collocates with 'null' to form 'null hypothesis,' the default assumption in hypothesis testing that no significant relationship or effect exists. 'Theory,' 'assumption,' and 'conclusion' do not form this standard statistical term.
Q20 20

Question 20: The term ___ refers to the degree to which a measurement tool consistently produces the same results under identical conditions.

Question 20 options
'Reliability' means the consistency and repeatability of a measurement. 'Validity' refers to whether a tool measures what it intends to measure. 'Accuracy' refers to closeness to the true value. 'Precision' refers to the fineness of the measurement.