Question

Use a graphing calculator to determine which equation for the line of regression, Pearson product-moment correlation value (r), and predicted value match the data in the chart. The chart below shows the number of hours a student spent studying for a math test and the score the student earned on the test.

Answer 1

I'm posting the work

Answer 2

Hours Spent Studying | 0.5|1.25| 1.5 |1.75 |2 | 2.5 |3 |3.5 |4 |

Test Score,,,................ | 90 | 75| 60 | 83 |75| 80| 99| 97| ? |

A) y = 6.4x + 69.5, r = 0.48
Predicted test score for 4 hours of study equals 95.

B) y = 6.1x + 74.5, r = 0.48
Predicted test score for 4 hours of study equals 99.

C) y = 5.1x + 74.5, r = 0.88
Predicted test score for 4 hours of study equals 95.

D) y = 7.4x + 69.5, r = 0.88
Predicted test score for 4 hours of study equals 99.

Answer 3

Do you know how to turn the (r) on on your calculator?

Answer 4

I don't have a calculator yet.... I need a ti-83 or 84 and my mom hasn't bought one yet :(

Answer 5

The online graphing calculators are hard to use too...

Answer 6

Then you can't do the problem. Google "virtual TI 84" and you should be able to download one

Answer 7

I'm so stuck please help someone!

Answer 8

u can use excel or any ohter spreadsheet program.

Answer 9

but how do I plot it in excel?

Answer 10

And thanks so much btw

Answer 11

give me a couple of min.

Answer 12

okay thanks so much you are the best!

Answer 13

here is the excel file

Answer 14

Thanks! SOOO Much!

Answer 15

u r welcome