Stats Chap. 2 Review

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often different values occur in a dataset, typically displayed in a table or graph.

Front

Define mode in statistics.

Back

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

Front

What does a sample size represent?

Back

The sample size is the number of observations or data points collected in a study.

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 purpose of a histogram?

Back

A histogram is used to represent the frequency distribution of numerical data, showing how many data points fall within specified ranges.

Front

Explain the concept of central tendency.

Back

Central tendency refers to the measure that represents the center or typical value of a dataset, commonly measured by mean, median, and mode.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities, while quantitative data represents numerical values that can be measured.

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. If there is an even number of observations, average the two middle values.

Front

What is a bar graph used for?

Back

A bar graph is used to compare different categories of data, showing the frequency or value of each category with rectangular bars.

Front

Define outlier in a data set.

Back

An outlier is a data point that differs significantly from other observations in a dataset, often due to variability or measurement error.