Stats Unit 1 and 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. It is the median of the lower half of the data.

Front

How do you calculate the interquartile range (IQR)?

Back

The interquartile range (IQR) is calculated by subtracting the lower quartile (Q1) from the upper quartile (Q3): IQR = Q3 - Q1.

Front

What does it mean if a distribution is skewed left?

Back

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

Front

What is the definition of RANGE in statistics?

Back

The range is the difference between the highest and lowest values in a data set. It is calculated as: Range = Maximum value - Minimum value.

Front

How do you determine the number of data points within a specific range?

Back

To find the number of data points within a specific range, count all the values that fall between the specified lower and upper limits.

Front

What is a box plot?

Back

A box plot is a graphical representation of a data set that displays the median, quartiles, and potential outliers.

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 a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Front

What is a normal distribution?

Back

A normal distribution is a symmetric, bell-shaped 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 a sample mean?

Back

The sample mean is the average of a set of values in a sample, calculated by summing all the values and dividing by the number of values.