Unit 1 Review

Front

What is a percentile?

Back

A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, sum all the values in the data set and then divide by the number of values.

Front

What is the median in a data set?

Back

The median is the middle value when the data set 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 the mode of a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

What is a quantitative variable?

Back

A quantitative variable is a variable that can be measured numerically, such as height, weight, or age.

Front

What is a qualitative variable?

Back

A qualitative variable is a variable that describes a characteristic or quality and cannot be measured numerically, such as color or type.

Front

What does it mean for a graph to misrepresent data?

Back

A graph misrepresents data if it distorts the true values or relationships, leading to incorrect interpretations.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered. The mean can be affected by outliers, while the median is more robust.

Front

How does an outlier affect the mean?

Back

An outlier can significantly increase or decrease the mean, making it less representative of the data set.

Front

What is the importance of central tendency measures?

Back

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