Question

Help on a pretty long Question?

Answer 1

The table represents data collected on the time spent studying (in minutes) and the resulting test grade.

Time Spent Studying (min) 52 37 31 9 26 40 22 10 45 34 19 60
Grade on Test 95 84 72 58 77 86 72 43 90 81 62 98

Part 1: Create a scatter plot with the predicted line of best fit drawn on it. Determine the type of correlation (if any), and predict the model that will be used.

Part 2: Find the line of best fit for the data either by hand or using technology. Explain your method. Find the predicted score for each time listed in the table.

Part 3: Find the residuals, and decide if your model is a good fit. Explain your method. (If your model is not a good fit, complete Part 2 again with a different set of points or choose a different model.)

Answer 2

Hints:
Start with a scatter plot.
Either draw the best-fit line by hand on the plot, or if you have a TI-83, use technology to calculate the best line.
Calculate the residuals by hand or using the TI. Residuals are the differences between the fitted line and the actual data.

Answer 3

Ok Thanks c:

Answer 4

You're welcome! :)