Join the IDNLearn.com community and get your questions answered by knowledgeable individuals. Find reliable solutions to your questions quickly and accurately with help from our dedicated community of experts.
Answer:
-1
Step-by-step explanation:
From 10 to 8.5 is - 1.5
this is -1 S.D. below the mean
(8.5 - 10)/1.5 = -1