Final answer:
The subject of this question is Mathematics, specifically statistics. We are given that the amount of time to complete a physical activity in a PE class is normally distributed with a mean of 35 seconds and a standard deviation of 3 seconds. The mean represents the average time it takes to complete the activity, while the standard deviation measures the variability or spread of the data.
Step-by-step explanation:
The subject of this question is Mathematics, specifically statistics.
We are given that the amount of time to complete a physical activity in a PE class is normally distributed with a mean of 35 seconds and a standard deviation of 3 seconds.
The mean represents the average time it takes to complete the activity, while the standard deviation measures the variability or spread of the data. In this case, it indicates how much the completion times typically vary from the mean.
Using this information, we can estimate the probability of completing the activity within a certain time range or calculate percentiles to understand the distribution of completion times.