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SmartOwl94
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.
I'm posting the work
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.
Do you know how to turn the (r) on on your calculator?
I don't have a calculator yet.... I need a ti-83 or 84 and my mom hasn't bought one yet :(
The online graphing calculators are hard to use too...
Then you can't do the problem. Google "virtual TI 84" and you should be able to download one
I'm so stuck please help someone!
u can use excel or any ohter spreadsheet program.
but how do I plot it in excel?
And thanks so much btw
give me a couple of min.
okay thanks so much you are the best!
here is the excel file