Data, Stats, & Probability Test Part 1

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) 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

How do you find the mean of a set of numbers?

Back

To find the mean, add all the numbers together and then divide by the total count of the numbers.

Front

What is the median in a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

What does a box-and-whisker plot show?

Back

A box-and-whisker plot displays the distribution of a data set based on five summary statistics: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in statistical analysis.

Front

How do you calculate the range of a data set?

Back

The range is calculated by subtracting the smallest value from the largest value in the data set.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered. They can differ significantly in skewed distributions.

Front

What is 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

What does it mean if two data sets have the same median?

Back

If two data sets have the same median, it means that the middle value of both sets is the same, but it does not indicate that the data sets are identical or have the same distribution.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts, with each part containing 25% of the data.