Unit 5 Review: Exploratory Data Analysis

Front

What is the maximum value in a data set?

Back

The maximum value is the largest number in a data set.

Front

True or False: All samples lead to a good prediction about an entire population.

Back

False. Not all samples are representative of the population.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data in ascending order and identify the middle value.

Front

What is the mean of a data set?

Back

The mean is the average of all the numbers in a data set, calculated by dividing the sum of the values by the number of values.

Front

What is standard deviation?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

Front

How do you calculate the mean of the following data set: 28, 18, 19, 18, 17?

Back

Mean = (28 + 18 + 19 + 18 + 17) / 5 = 20.

Front

What is the formula for standard deviation?

Back

Standard deviation (σ) = √(Σ(xi - μ)² / N), where μ is the mean and N is the number of values.

Front

What does a higher standard deviation indicate about a data set?

Back

A higher standard deviation indicates that the data points are spread out over a wider range of values.

Front

What is the difference between population and sample in statistics?

Back

A population includes all members of a defined group, while a sample is a subset of the population.

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations in the data set.