Statistics Review

Front

What is the definition of a survey in statistics?

Back

A survey is a method of collecting data by asking questions to a group of people to gather information about their opinions, behaviors, or characteristics.

Front

How do you calculate the percentage of a specific choice in a survey?

Back

To calculate the percentage, divide the number of people who chose that option by the total number of respondents, then multiply by 100.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1). It represents the range of the middle 50% of the data.

Front

What is a random sample?

Back

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

Front

What is the purpose of using a sample in statistics?

Back

The purpose of using a sample is to make inferences about a larger population without having to survey every individual.

Front

How do you predict the total number of individuals in a population based on a sample?

Back

To predict the total, use the proportion of the sample that exhibits a certain characteristic and apply it to the total population size.

Front

What is a dot plot?

Back

A dot plot is a simple statistical chart that consists of dots plotted on a number line, representing the frequency of data points.

Front

What does it mean if a data set has a greater spread?

Back

A greater spread indicates that the data points are more dispersed and vary widely from the average, showing more diversity in the data.

Front

What is the mode in a data set?

Back

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

Front

What is the median in a data set?

Back

The median is the middle value when the data points are arranged in ascending order. If there is an even number of observations, it is the average of the two middle values.