D15 U7 CIA Review Flashcardizz

Front

What is the definition of mean in statistics?

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

What is the definition of median in statistics?

Back

The median is the middle value in a set of numbers when they are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

What does it mean if the mean is greater than the median?

Back

It typically indicates that the data set is positively skewed, meaning there are some high values that are pulling the mean up.

Front

What does it mean if the mean is less than the median?

Back

It usually indicates that the data set is negatively skewed, meaning there are some low values that are pulling the mean down.

Front

How does a low score affect the mean of a data set?

Back

A low score will decrease the mean of the data set because it lowers the overall average.

Front

How does a low score affect the median of a data set?

Back

A low score may not affect the median if it is not in the middle of the ordered data set.

Front

What is the interquartile range (IQR)?

Back

The IQR is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1).

Front

What is the standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

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 certain ranges.

Front

What is the best measure of center for symmetric data?

Back

The mean is the best measure of center for symmetric data.