How to round correctly when calculating the average and standard deviation? Is my Chemistry book wrong on the significant figures in this exercise?
Why did they round to 0.16 instead of 0.1580 ?


  


Also why did they round down the means?
I figured it out.

The means are rounded to only two sig figs because its subtraction.
And significant figures follow different rules under subtraction/addition vs multiplication/division.

And its 0.16 for the same reason that the means are only two sig figs.
Because its addition, not multiplication/division.

derp, two hours down the drain