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Attached the solution and work.
The proportion is 0.4401.
We find z-scores that correspond with both ends of this interval. Z-scores are given using the formula:
For the lower end,
The proportion of scores to the left of this number is 0.2514.
For the higher end, the z-score is
The proportion of scores to the left of this number is 0.6915.
To find just the proportion of scores between these two, we subtract;
0.6915-0.2514 = 0.4401.
We find z-scores that correspond with both ends of this interval. Z-scores are given using the formula:
For the lower end,
The proportion of scores to the left of this number is 0.2514.
For the higher end, the z-score is
The proportion of scores to the left of this number is 0.6915.
To find just the proportion of scores between these two, we subtract;
0.6915-0.2514 = 0.4401.