Statistics Review

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion, 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

Which car club has the higher median?

Back

The Car Hops car club has the higher median.

Front

Find the median of the data set: 3, 8, 27, 30.

Back

The median of the data set is 17.5.

Front

Which box and whisker plot shows more 'spread out' data?

Back

The bottom plot shows more 'spread out' data because of the difference in ranges.

Front

What is a biased sample?

Back

A biased sample is a sample that does not accurately represent the population from which it is drawn, leading to skewed results.

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 box and whisker plot?

Back

A box and whisker plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

How do you find the range of a data set?

Back

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

Front

What does it mean for data to be 'spread out'?

Back

Data is considered 'spread out' when there is a large range or variability among the values in the data set.

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in statistical analysis.