Mrs. johnson gives three tests in her high school physics course

Mrs. Johnson gives three tests in her high school physics course. She tells her class that in order to get an A grade they must have an accumulated 300 points on the tests. • She then tells them that based on last year’s class that the students should expect to study a specific number of hours to get an A. • The table given below has the scores and hours studied for last year’s class. Figure out how many hours Mrs. Johnson tells the new class they must study to get an A grade. Then figure out how confident Mrs. Johnson is that the prediction of hours of study needed is correct.

 

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                              Hours Studying                                Accumulated Test Points
12.6 285
5.0 216
12.0 313
4.7 239
9.6 244
8.2 250
12.0 266
17.3 308
15.6 298
17.1 322
8.0 289
9.0 259
8.0 227
8.8 277
7.1 202

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