Another one I can't get on the same topic as my last question.
A. I don't remember anything about the distribution of the scores on the ninth exam, but I do know that the mean score was 80 and the standard deviation was 5. Determine an interval guaranteed to include at least 75% of the students' scores.

B. Determine an interval guaranteed to include at least 88% of the students' scores on the ninth exam.

Question

Another one I can't get on the same topic as my last question. 
A. I don't remember anything about the distribution of the scores on the ninth exam, but I do know that the mean score was 80 and the standard deviation was 5. Determine an interval guaranteed to include at least 75% of the students' scores. 

B. Determine an interval guaranteed to include at least 88% of the students' scores on the ninth exam.

jhonyy9 · Answer

,,the standard deviation was ... how many from there you have missed anything ?

anonymous · Answer

The standard deviation was 5.

anonymous · Answer

@Tomfoolery1 Can you/ have you figured anything out with this?

tomfoolery1 · Answer

*crying* not one bit

anonymous · Answer

Okay, I'm going to just leave it here and work on it last.