Statistics - Line of Best Fit

Front

What is a line of best fit used for?

Back

To make predictions

Front

Which sentence describes the relationship shown on this scatter plot? Options: As the temperature decreases, the visitors increase. , As the temperature increases, the number of visitors increases. , As the visitors increase, the temperature decreases. , No correlation

Back

As the temperature increases, the number of visitors increases. 

Front

What type of association does this graph show? Options: Positive, negative, none, all of the above

Back

none

Front

What would be the correlation between study time and test grades?

Back

positive

Front

Determine the predicted income if 22 hours were worked on an assembly job.

Back

$449.60

Front

This measures how strong or weak the relationship between 2 quantitative variables are.

Back

Correlation coefficient

Front

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

Back

Strong negative

Front

Residuals are . . .

Back

the difference between the observed response and the values predicted by the model

Front

What does the slope mean in the context of the equation: predicted math grade = 65 + 2.56(study hours)?

Back

The model predicts an increase of 2.56 points in the math grade per hour studied, on average.

Front

Back

-1.2