Explanation:
The correct answer is B) 25-75.
In the range of middle 2/3, or the interquartile range, approximately 50% of the values fall below the median and 50% fall above the median. This means that the middle 2/3 range encompasses approximately 25% to 75% of the values.
Similarly, when talking about roughly 90% of the values closest to the average, we consider the range within one-and-a-half standard deviations from the mean. In a normal distribution, this range covers approximately 25% to 75% of the values as well.
Therefore, both the middle 2/3 of the values and the range of roughly 90% of the values closest to the average fall within the range of 25-75.