A burette graduated in steps is used to deliver a fixed volume of liquid seven times

PHYSICS · Multi-part · Fermi University Physics · Scientific Practice & Experimental Methods · Uncertainty in measurement · Uncertainty in measurement

Measurement and Method, Ch Repeated readings: scatter, the mean and the standard error

Problem

A burette graduated in

0.1\,\mathrm{mL}

steps is used to deliver a fixed volume of liquid seven times, with the volume delivered read off each time (mL):

25.2,\ 25.4,\ 25.3,\ 25.1,\ 25.3,\ 25.4,\ 25.2

. ((a)) Calculate the mean volume delivered

\bar V

and the sample standard deviation

s

. ((b)) Calculate the standard error of the mean,

\sigma_{\bar V}

. ((c)) Write the mean volume delivered in house form, stating

N

. ((d)) Name two effects that this uncertainty does not include.

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