P value and statistical significance:
Chi squared equals 7.155 with 3 degrees of freedom.
The two-tailed P value equals 0.0671
By conventional criteria, this difference is considered to be not quite statistically significant.
The P value answers this question: If the theory that generated the expected values were correct, what is the probability of observing such a large discrepancy (or larger) between observed and expected values? A small P value is evidence that the data are not sampled from the distribution you expected.