Statitics Review

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What is a survey?

Back

A survey is a method of collecting data from a group of individuals to gather information about their opinions, behaviors, or characteristics.

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What does it mean to find the mode of a set of numbers?

Back

The mode is the number that appears most frequently in a data set.

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How do you calculate the median of a data set?

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To find the median, arrange the numbers in order and identify the middle number. If there is an even number of values, the median is the average of the two middle numbers.

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What is a population in statistics?

Back

A population is the entire group of individuals or items that you want to study or draw conclusions about.

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What is a sample in statistics?

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A sample is a subset of a population that is used to represent the larger group.

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What does it mean to predict in statistics?

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To predict means to make an educated guess about a future outcome based on existing data.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data consists of numerical values that can be measured.

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What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100, often used to compare proportions.

Front

How do you calculate a percentage of a number?

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To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 20% of 50 is 50 * 0.20 = 10.

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What is the significance of a random sample?

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A random sample ensures that every individual in the population has an equal chance of being selected, which helps to reduce bias.