Stats review- Unit 3 test

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

What does a negative correlation indicate in a scatter plot?

Back

As one variable increases, the other variable tends to decrease.

Front

How can you determine the number of hours worked based on earnings from a graph?

Back

By finding the point on the graph that corresponds to the earnings and reading the associated hours.

Front

What is the equation of a line in slope-intercept form?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What does it mean if a scatter plot shows no correlation?

Back

There is no apparent relationship between the two variables being measured.

Front

How do you interpret the slope of a line of best fit?

Back

The slope indicates the rate of change between the two variables.

Front

What is the purpose of a trend line in data analysis?

Back

To summarize the relationship between variables and make predictions.

Front

What is the significance of the y-intercept in a linear equation?

Back

It represents the value of y when x is zero.

Front

How can you estimate values using a trend line?

Back

By locating the x-value on the line and reading the corresponding y-value.

Front

What does it mean if the more books students read, the higher their English grade?

Back

There is a positive correlation between the number of books read and English grades.