Unit 5 Review: Exploratory Data Analysis

Front

What is the mean of a data set?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

How do you find the first quartile (Q1) in a data set?

Back

Q1 is the median of the lower half of the data set, which separates the lowest 25% of the data from the rest.

Front

Calculate the mean of the following numbers: 2, 9, 10, 6, 8.

Back

The mean is 7.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in the data set.

Front

Find the range of the following scores: 155, 165, 138, 172, 127, 193, 142.

Back

The range is 66.

Front

What is a box and whisker plot?

Back

A box and whisker plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

Define outlier in a data set.

Back

An outlier is a value that is significantly higher or lower than the other values in a data set.

Front

What is the median of a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

How do you calculate the mode of a data set?

Back

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

Front

What is the purpose of exploratory data analysis (EDA)?

Back

EDA is used to summarize the main characteristics of a data set, often using visual methods.