Time (seconds)              Distance rolled (cm)
                        1       2       3        avg      uncert
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    0.5 +/- 0.005       6.9     7.1     7.0         7.0 +/-  0.1

    1.0 +/- 0.005      25.0    25.5    24.9        25.1 +/-  0.3

    1.5 +/- 0.005      58.3    58.0    58.4        58.2 +/-  0.2

    2.0 +/- 0.005     100.9   101.3   101.1       101.1 +/-  0.2

    2.5 +/- 0.005     157.9   157.4   157.4       157.6 +/-  0.3

    3.0 +/- 0.005     230.1   230.0   230.1       230.2 +/-  0.3

    3.5 +/- 0.005     315.7   315.6   315.3       315.5 +/-  0.2
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