From my understanding you want to check if the global warming data is normally distributed or not.
The chi2gof(x) returns a test decision for the null hypothesis that the data in vectorxcomes from a normal distribution with a mean and variance estimated fromx, using thechi-square goodness-of-fit test. The alternative hypothesis is that the data does not come from such a distribution. The result is1if the test rejects the null hypothesis at the 5% significance level, and0otherwise.
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