IB Math Topic 4: Statistics Vocabulary

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Population: Members of a group being studied.

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Options: 1. Data points > 1.5*IQR from Q1/Q3. 2. Selecting a sample. 3. Data points on a smooth curve.

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Descriptive Statistics: Data collection and analysis of a population's characteristics.

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Correct Answer: Data collection and analysis of characteristics of a chosen population.

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Reliability: Degree to which data is free of errors and bias.

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Definition of reliability in data analysis.

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Bias: Intentional or unintentional flaw in data collection design.

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Correct Answer: Intentional or unintentional flaw in data collection design.

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Bins or categories for grouping data by value range (e.g., age cohorts in Population Pyramids).

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Interval/Class definition.

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Standard Deviation/Variance: Measures how much a data set varies from the mean; higher values indicate more spread.

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Correct Answer: Measures how much the data set varies or deviates from the mean. Higher values mean more spread.

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Modal Class: Class with the highest frequency.

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Correct answer: Class with the highest frequency.

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Normal Distribution: Mean & median are similar; data is evenly spread around them.

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Correct Answer: Mean & median are close; data is evenly dispersed.

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Measures of Central Tendency: Mean, median, mode, modal class

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Correct answer: Mean, median, mode, modal class.

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Measures of Dispersion: Identify the correct set.

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Range, interquartile range, standard deviation, variance.