Comment on the outcome of the experiment in the light of the chi-squared probability

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Homework Statement

Plot the data with uncertainty bars and the best fit line on the same graph and comment on the outcome of the experiment in the light of the chi-squared probability and the graphical comparison of the best fit line and data

The Attempt at a Solution

my value for chi-squared and the graph seem to contradict each other. The value I got for chi-squared was small, suggesting over-estimated uncertainties, but when the error bars are plotted on the graph, some of the points on the graph are outside the error bars, suggesting that the error that was estimated might have been too small. What does this mean?

 

[NateD]

It means that the data does not fit the best fit line, which suggests that the experiment did not yield the desired results.