What percentage of values lies within the range 9.9818 +/- 0.0057 mL?

Question

What is the numbers of values? and what is the percentage?

I don't understand this question, could somebody please help me?

Answer 1

There has to be more information in the directions. Most likely you are given a standard deviation somewhere in the problem. If you are, you'd likely find a z-score associated with .0057 and then use a table or software to find the percentage that answers your question. As it is, though, you don't have enough information.