Intro to Stats: Fall Final Practice

Front

What is the definition of a data set?

Back

A collection of related data points or values that are used for analysis.

Front

What is the mean in statistics?

Back

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

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

How do you calculate the z-score?

Back

Front

What does a skewed left distribution indicate?

Back

It indicates that the majority of the data points are concentrated on the right side, with a long tail extending to the left.

Front

What is the purpose of a histogram?

Back

A histogram is used to represent the frequency distribution of numerical data by showing the number of data points that fall within specified ranges.

Front

What is the 50th percentile?

Back

The value below which 50% of the data falls, also known as the median.

Front

What is a bell curve?

Back

A bell curve, or normal distribution, is a symmetrical distribution where most of the observations cluster around the central peak and probabilities for values further away from the mean taper off equally in both directions.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize and describe the features of a data set, while inferential statistics use a random sample of data to make inferences about a larger population.

Front

What is a sample in statistics?

Back

A subset of a population used to represent the entire group.