Unit 1 Assessment

Front

What is the standard deviation?

Back

The standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion and is calculated as the difference between the third quartile (Q3) and the first quartile (Q1). It represents the range of the middle 50% of the data.

Front

What type of graph is used to display the frequency of data?

Back

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

Front

How do you find the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. If no number repeats, the data set has no mode.

Front

What does a dot plot represent?

Back

A dot plot is a simple statistical chart that consists of dots plotted on a number line, where each dot represents one data point. It is useful for displaying small data sets.

Front

What is the mean of a data set?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

How do you determine the range of a data set?

Back

The range is calculated by subtracting the smallest value in the data set from the largest value.

Front

What is a frequency table?

Back

A frequency table is a table that displays the number of occurrences of each value in a data set, helping to summarize and analyze the data.

Front

What is the purpose of a box plot?

Back

A box plot (or whisker plot) visually summarizes the distribution of a data set by displaying its minimum, first quartile, median, third quartile, and maximum.

Front

What does it mean if a data set is skewed?

Back

A skewed data set is one that is not symmetrical and has a longer tail on one side. Right skew (positive) has a tail on the right, while left skew (negative) has a tail on the left.