If a prepubescent girl's plot on a weight-for-age growth chart is at the 75th percentile, what does this indicate?

Plotting at the 75th percentile on a weight-for-age growth chart indicates that the prepubescent girl weighs more than 75% of her same-age peers. This percentile is typically considered to fall within the normal range for weight because growth charts are designed to show the distribution of weight status among children. Percentiles indicate where an individual's measurements stand in relation to the population, and being at the 75th percentile suggests that the girl's weight is on the higher side of the normal range but does not indicate a concern for being overweight or underweight. Instead, it reflects that her weight is appropriate when compared to the vast majority of her peers.

In the context of the other options, being below the normal range for weight would imply a situation where the percentile is significantly low, which is not the case here. Being above normal range typically refers to a higher threshold, possibly in the 90th percentile or above, which again is not applicable at the 75th percentile. Being measured on the wrong chart does not apply since the information provided specifies the context of the weight-for-age growth chart. Thus, the conclusion is that the measurement at the 75th percentile indicates the girl is within the normal range for weight.