Alg 1 Stats Review

Front

What is a linear regression equation?

Back

A linear regression equation is a mathematical representation of the relationship between two variables, typically in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you calculate the slope in a linear regression?

Back

The slope (m) is calculated by taking the change in the y-values divided by the change in the x-values (rise over run) between two points on the line.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept (b) represents the value of y when x is 0, indicating where the line crosses the y-axis.

Front

What is the range in a data set?

Back

The range is the difference between the maximum and minimum values in a data set.

Front

How do you identify an outlier in a data set?

Back

An outlier is a data point that is significantly different from the other points in the data set, often identified using statistical methods such as the interquartile range.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

Front

What is the purpose of calculating a line of best fit?

Back

The purpose is to make predictions about one variable based on the value of another variable.

Front

What does it mean if 100% of the data falls within a certain range?

Back

It means that all data points in the data set are included within that specified range.

Front

How do you interpret the slope of a linear regression line?

Back

The slope indicates the rate of change of the dependent variable (y) for each unit increase in the independent variable (x).

Front

What is the formula for calculating the percentage of data within a range?

Back

Percentage = (Number of data points within the range / Total number of data points) x 100.