Keystone Data Review

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, showing the trend of the data points.

Front

How do you calculate the expected value using a linear equation?

Back

Substitute the value of x into the equation y = mx + b to find the corresponding y value.

Front

What does the first quartile (Q1) represent in a data set?

Back

The first quartile is the median of the lower half of the data set, meaning 25% of the data points are below this value.

Front

If the first quartile of a data set is 7.5, how many players practiced for at least this amount?

Back

At least 9 out of 12 players practiced for at least 7.5 hours.

Front

What is the significance of median in a data set?

Back

The median is the middle value that separates the higher half from the lower half of the data set.

Front

How do you determine the number of students lifting less than a certain weight?

Back

Count the number of data points that fall below the specified weight.

Front

What is a scatter plot?

Back

A graph that uses dots to represent the values obtained for two different variables, showing the relationship between them.

Front

What does it mean if two countries won the same number of medals in different years?

Back

It indicates that their performance in the events was consistent across those years.

Front

How can you interpret the slope of a linear equation?

Back

The slope indicates the rate of change of y with respect to x; in the equation y = mx + b, m is the slope.

Front

What is the purpose of rounding data in statistics?

Back

Rounding simplifies data for easier interpretation and analysis, especially when dealing with large numbers.