Sentences with phrase «statistically significance of the trend»

The ratio of trend estimate to its standard deviation, called the t - ratio, is used as measure of the statistically significance of the trend.

Not exact matches

The total variance in the data gives an upper limit to the errors, and using that upper limit we can compute a statistically reliable estimate of the significance of the trend.

I am especially interested in the mathematical details outlined in this sentence; «The total variance in the data gives an upper limit to the errors, and using that upper limit we can compute a statistically reliable estimate of the significance of the trend.»

First, Happer mentions statistical significance, but global surface temperature trends are rarely if ever statistically significant (at a 95 % confidence level) over periods as short as a decade, even in the presence of an underlying long - term warming trend, because of the natural variability and noise in the climate system.

However, none of the trends is statistically significantly different from a Zero trend, applying a 2 - sigma significance threshold.

I asked for the evidence for this assertion, and I showed with some data sets that there are discernible trends over the last 16 years in most of those sets, which are not statistically significant at a significance level of 95 %, though.

The absence of a statistically significant trend (at a significance level of 5 per cent) means that if the null hypothesis true, there is at least a 5 per cent chance of a Type 1 error.

There will never have been statistically significant global warming is the last few years, because statistical significance is heavily dependent on the amount of data points and hence the length of the record you are trending.

Those scatter diagrams as presented simply show a lot of scatter and I doubt that the trend lines have any statistical significance or that any features can be implied statistically, but then I am not a statistician — in fact not even close.

This is nothing but an attempt to discredit the significance of the trend, something you disparage but which can be confirmed statistically.

Whether a trend is statistically significant does not depend only on the number of years, it depends also on the frequency of data collection, the amount of noise in the system (and the noise in the data collection system), the size of the trend (a smaller trend will take longer to achieve significance), and the amount of autocorrelation in the data series.

I am getting hungry so later after breakfast I will get back to you to explain the significance of the graphs with respect to pauses and from how far back you can determine when positive trends are statistically significant.

The lack of statistical significance in temperate trends since 1998 is at least partly a statistical power issue - there is not enough data (since 98) to achieve a statistically significant result, even if there has been warming.