# Some students paid a private tutor to help them their results on a certain mathematical te

**Question description**

Some students paid a private tutor to help them their results on a certain mathematical test. These students had a mean change in score of +16 points, with a standard deviation of 63 points. In a random sample of 100 students who pay a private tutor to help them improve their results, what is the likelihood that change in the sample mean score is less than 10 points?

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