Final answer:
The group of points labeled N is called outliers, and the point labeled M is called median. The presence of point M represents the typical or average number of hours students in the group study in a week.
Step-by-step explanation:
The group of points labeled N in the scatter plot is called outliers. Outliers are data points that are significantly different from the other data points. They can be caused by various factors such as measurement error or unusual circumstances.
The point labeled M is called median. The median is the middle value in a set of data points when they are arranged in ascending or descending order. In this context, the point labeled M represents the median number of hours students study in a week.
The presence of point M can be explained by the fact that it represents the typical or average number of hours students in the group study in a week.