A2B Flashcard 6.1-6.3 Statistics

Front

What does it mean if a histogram is right skewed?

Back

A right skewed histogram has a longer tail on the right side, indicating that the majority of the data points are concentrated on the left.

Front

What is a statistical question?

Back

A statistical question anticipates variability in the data and can be answered by collecting data. For example, 'How long will you typically be on hold when you call your cell phone provider?' is a statistical question.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is a measure of statistical dispersion, calculated as the difference between the upper (Q3) and lower (Q1) quartiles. It represents the range of the middle 50% of the data.

Front

What is the median?

Back

The median is the middle value of a data set when it is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What is the mode?

Back

The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

Front

What does it mean if a graph is symmetrical?

Back

A symmetrical graph has a balanced shape, where the left and right sides are mirror images of each other, indicating that the data is evenly distributed around the center.

Front

What is a dot plot?

Back

A dot plot is a simple statistical chart that consists of dots plotted on a number line, where each dot represents one observation in the data set.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in a data set, providing a measure of how spread out the values are.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, where the data is divided into bins or intervals, and the frequency of data points in each bin is represented by the height of bars.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts. The first quartile (Q1) is the median of the lower half, the second quartile (Q2) is the median, and the third quartile (Q3) is the median of the upper half.