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If a data point in a normal distribution has a Z-score of -2, what does this mean?
If we know that a dataset follows a normal distribution, what percentage of data falls within 1 standard deviation of the mean?
If a normal distribution has a mean of 50 and a standard deviation of 5, what is the Z-score for a data point that is 60?
In a standard unit normal table, what does a Z-score of 0 correspond to in terms of percentile?