In a keyboarding class, the instructor guarantees that at the end of the course, the class will type an average of 40
words per minute. The table shows the words per minute typed for a random sample of 10
students for their final exam.



Based on these data, did the students type more or less than the instructor predicted, and by how much?

Responses

The students typed less than predicted by 1.2
words per minute.
The students typed less than predicted by , 1.2 , words per minute.

The students typed less than predicted by 38.8
words per minute.
The students typed less than predicted by , 38.8 , words per minute.

The students typed more than predicted by 1.2
words per minute.
The students typed more than predicted by , 1.2 , words per minute.

The students typed more than predicted by 38.8
words per minute.