One Variable Statistics P2

Front

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

Back

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

Front

How do you find the upper quartile (Q3) in a data set?

Back

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

Front

What is a dot plot and how is it used in statistics?

Back

A dot plot is a simple graphical display that uses dots to represent the frequency of data points in a data set. It helps visualize the distribution of data.

Front

What is the purpose of calculating quartiles in a data set?

Back

Quartiles divide a data set into four equal parts, allowing for the analysis of the spread and center of the data, and helping to identify outliers.

Front

What does it mean if a data set has a mode?

Back

The mode is the value that appears most frequently in a data set. A data set can have one mode, more than one mode, or no mode at all.

Front

How do you determine the range of a data set?

Back

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

Front

What is the significance of the lower quartile (Q1)?

Back

The lower quartile (Q1) is the median of the lower half of the data set and represents the 25th percentile, indicating that 25% of the data falls below this value.

Front

How can you interpret the results of a dot plot?

Back

By analyzing the dot plot, you can determine the frequency of each score, identify the mode, and observe the overall distribution and any potential outliers.

Front

What is the difference between a population and a sample in statistics?

Back

A population includes all members of a specified group, while a sample is a subset of the population used to make inferences about the whole.

Front

What is the importance of understanding measures of central tendency?

Back

Measures of central tendency (mean, median, mode) provide a summary of the data set and help to understand the typical value within the data.