Question

which substance has the lowest variability?
uric acid
phosphate
oxalate

Explanation:

Step1: Understand variability in error bars

In a bar - chart with error bars, the length of the error bar represents the variability. A shorter error bar means lower variability.

Step2: Compare error bar lengths

Looking at the error bars for phosphate, oxalate, and uric acid:

• The error bar for phosphate is the shortest among the three.

Answer:

phosphate