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What is the mean?
The average of all values in a dataset
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What is the median?
The middle value when data is arranged in order
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What is the standard deviation?
A measure of how spread out data points are from the mean
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What is a normal distribution?
A bell-shaped probability distribution that is symmetric about the mean
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What is the empirical rule (68-95-99.7)?
$68%$ within $1\sigma$, $95%$ within $2\sigma$, $99.7%$ within $3\sigma$ of the mean
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What is the mode?
The value that appears most frequently in a dataset
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What is variance?
The average of squared differences from the mean
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What is correlation?
A measure of linear relationship between two variables
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What is a p-value?
The probability of obtaining results at least as extreme as observed
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What is the central limit theorem?
Sample means approach normal distribution as sample size increases
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