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A tutoring center advertised it could raise a student's college entrance exam score by 10 points. A random sample of 50 students had a mean

A tutoring center advertised it could raise a student's college entrance exam score by 10 points. A random sample of 50 students had a mean increase of 8 points, with a standard deviation of 5 points. Using the table below, find the 99% confidence interval. Confidence Level (as a percent) -value 90 1.645 95 1.960 99 2.576 6.18 to 9.82 6.84 to 9.16 6.614 to 9.39 6.20 to 9.84

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