One Variable Statistics P7

Front

What is the definition of a quartile in statistics?

Back

A quartile is a type of quantile that divides a data set into four equal parts, with each part containing 25% of the data.

Front

How do you calculate the upper quartile (Q3)?

Back

To calculate Q3, first arrange the data in ascending order, then find the median of the upper half of the data set.

Front

What is the median in a data set?

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 dot plot and how is it used in statistics?

Back

A dot plot is a simple visual representation of data where each data point is represented by a dot above a number line, allowing for easy comparison of frequencies.

Front

How do you determine the total number of observations from a dot plot?

Back

To determine the total number of observations from a dot plot, count the number of dots for each value and sum them up.

Front

What is the significance of the median in a data set?

Back

The median is significant because it provides a measure of central tendency that is not affected by extreme values (outliers) in the data.

Front

What does it mean if a data set is skewed?

Back

A data set is skewed if it is not symmetrical, meaning that one tail is longer or fatter than the other, which can affect the mean and median.

Front

How can you identify the mode of a data set?

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 is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set, providing a measure of the spread of the data.

Front

What is the purpose of using measures of central tendency?

Back

Measures of central tendency, such as mean, median, and mode, summarize a data set with a single value that represents the center of the data.