Answer :
The best answer to fill in the blank would be 95%. This is based on the Empirical Rule, which states that for a bell-shaped distribution, approximately 95% of the data falls within 2 standard deviations of the mean.
The Empirical Rule, also known as the 68-95-99.7 rule, is a statistical rule that applies to data that is approximately normally distributed or bell-shaped. According to this rule:
Approximately 68% of the data falls within one standard deviation of the mean.
Approximately 95% of the data falls within two standard deviations of the mean.
Approximately 99.7% of the data falls within three standard deviations of the mean.
In this case, since the data is bell-shaped, we can apply the Empirical Rule and conclude that approximately 95% of the data falls within 2 standard deviations. This means that the correct answer to fill in the blank is 95%.
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