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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.

  • one year ago
  • one year ago

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  1. SmartOwl94
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    I'm posting the work

    • one year ago
  2. SmartOwl94
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    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.

    • one year ago
  3. lisapeajac
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    Do you know how to turn the (r) on on your calculator?

    • one year ago
  4. SmartOwl94
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    I don't have a calculator yet.... I need a ti-83 or 84 and my mom hasn't bought one yet :(

    • one year ago
  5. SmartOwl94
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    The online graphing calculators are hard to use too...

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

    • one year ago
  7. SmartOwl94
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    I'm so stuck please help someone!

    • one year ago
  8. helder_edwin
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    u can use excel or any ohter spreadsheet program.

    • one year ago
  9. SmartOwl94
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    but how do I plot it in excel?

    • one year ago
  10. SmartOwl94
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    And thanks so much btw

    • one year ago
  11. helder_edwin
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    give me a couple of min.

    • one year ago
  12. SmartOwl94
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    okay thanks so much you are the best!

    • one year ago
  13. helder_edwin
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    here is the excel file

    • one year ago
  14. SmartOwl94
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    Thanks! SOOO Much!

    • one year ago
  15. helder_edwin
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    u r welcome

    • one year ago
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