In a research study on test scores for a certain subject, the scores were normally distributed with a mean of 75 and a standard deviation of 7. If a researcher wants to identify the proportion of participants who scored between 80 and 90, calculate that proportion would get a B. A normal distribution curve, marking the mean and standard deviations. Shade the area that corresponds to scores between 80 and 90. find the proportion of participants in that range. State the proportion found and discuss:result implies about the participants' performance.

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