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The teacher tells Dr. Johnsonthat students inher graduate statistics class in general get an average of 85 on their final exam. He asks for this
The teacher tells Dr. Johnsonthat students inher graduate statistics class in general get an average of 85 on their final exam. He asks for this years data, and he calculates that this sample of 7 students had a mean of 82 with a standard deviation of 5.0. Is this good statistical evidence for him to tellthe teacherthather mean exam grades are significantly lower than 85?
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