Ch 9 Data & Data Analysis REVIEW

Front

What graph shows a POSITIVE correlation?

Back

A scatter plot where points trend upwards from left to right, indicating that as one variable increases, the other variable also increases.

Front

Mode of the data set: 67, 74, 95, 98, 98, 99, 102

Back

98, because it is the number that appears most frequently in the data set.

Front

To find the average of a set of numbers, add up all the items and divide by...

Back

The number of items in the set.

Front

How many students chose a hamburger or sandwich for lunch?

Back

10 students.

Front

What is the mean?

Back

The average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

What is a histogram?

Back

A graphical representation of the distribution of numerical data, using bars to show the frequency of data points in specified ranges.

Front

What is a bar graph used for?

Back

To compare different categories of data using rectangular bars, where the length of each bar is proportional to the value it represents.

Front

What does the median represent in a data set?

Back

The middle value when the numbers are arranged in order; if there is an even number of observations, it is the average of the two middle numbers.

Front

What is a line graph?

Back

A type of graph that uses lines to connect data points, showing trends over time.

Front

What is a pie chart?

Back

A circular statistical graphic divided into slices to illustrate numerical proportions.