Topic 11 and 12 Review

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Back

Front

What is a z-score and how is it used in comparing scores?

Back

A z-score indicates how many standard deviations an element is from the mean. It is used to compare scores from different distributions.

Front

What is the formula for exponential growth or decay?

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Front

What is the best method to reduce bias in a survey?

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Randomly selecting participants from the entire population reduces bias.

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What is the probability of an event?

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The probability of an event is the number of favorable outcomes divided by the total number of possible outcomes.

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How do you calculate a z-score?

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What does it mean if a score is above the mean in a normal distribution?

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It indicates that the score is better than average compared to the rest of the data.

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What is the significance of the mean in a normal distribution?

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The mean is the central value around which the data is distributed.

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What is the standard deviation and why is it important?

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Standard deviation measures the dispersion of a set of data points. It indicates how spread out the values are from the mean.

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What is a random sample?

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A random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.