CSA #2 Review

Front

What is the lower quartile (Q1)?

Back

The lower quartile (Q1) is the value that separates the lowest 25% of a data set from the rest. In the given data, Q1 is 60.

Front

How do you determine the total number of observations in a histogram?

Back

To determine the total number of observations in a histogram, you sum the heights of all the bars. In the example, there are 31 observations.

Front

What does a larger spread of data in a dot plot indicate?

Back

A larger spread of data in a dot plot indicates greater variability among the data points. For example, the dot plot for Basketball Players shows a larger spread than that for Softball Players.

Front

What is a peak in a data display?

Back

A peak in a data display is the highest point where data values are concentrated, indicating the mode or most frequent value.

Front

How is the mean calculated?

Back

The mean is calculated by finding the sum of all data points and then dividing by the number of data points.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, using bars to show the frequency of data within certain ranges.

Front

What is the difference between mean and median?

Back

The mean is the average of all data points, while the median is the middle value when the data is arranged in order.

Front

What does it mean if a data set has an outlier?

Back

An outlier is a data point that is significantly different from the other data points in the set, often lying outside the overall pattern.

Front

What is a dot plot?

Back

A dot plot is a simple statistical chart that consists of dots representing the frequency of data points along a number line.

Front

What is the purpose of a data display?

Back

The purpose of a data display is to visually represent data to make it easier to understand patterns, trends, and distributions.