The Jungle is self-supported by showing advertisements via Google Adsense.
Please consider disabling your advertisement-blocking plugin on the Jungle to help support the site and let us grow!
We also show significantly less advertisements to registered users, so create your account to benefit from this!
Please consider disabling your advertisement-blocking plugin on the Jungle to help support the site and let us grow!
We also show significantly less advertisements to registered users, so create your account to benefit from this!
Questions or concerns about this ad? Take a screenshot and comment in the thread. We do value your feedback.
Article: Conservative agenda aims to kill science in United States
|
Quote:You clearly have no idea what conclusion I've arrived at concerning the topic. Where did I ever say that it's not a real phenomenon? Not understanding what "significant" means makes it clear you don't have a background in science. If results are statistically significant it means that you accept or reject the null hypothesis (something like there is no warming or warming = 0). There are various test to determine the degree of significance usually based on the probability of having a 5% (p < 0.05, 95% confidence) chance of finding a difference as large or larger than the one in your study given that the null hypothesis is true. I'll give you a very basic illustration of how this works. Say I am interested in the effect of solar radiation on tropospheric warming, and using average temperatures over a span of 50 years as an endpoint. Say you took 100 temperature measurements for each of those 50 years (you might need to run a power calculation to determine if this is an adequate sample size).You could use other endpoints but I am using temperature as one in this example. HO (null hypothesis): Solar activity has no significant effect on tropospheric warming. HA ![]() So in this very very simplistic exercise you might run a ANOVA (this would probably be a bad test because the data is likely not normally distributed and the test is not very robust, Kruskal-Wallis, PERMANOVA, etc might be better). on the averages using a program like R. The output will have a test statistic (F-value) and the degree of significance. Let's say we were testing at p < 0.05. If our results indicate p = 0.002, then we would reject the null hypothesis and accept the alternative. We reject the null because at the significance level of 0.05, the results obtained happen too frequently for us to be confident that solar activity has a effect on tropospheric warming. The opposite can also happen. If p = 0.06, the you would accept the null and the results would indicate that solar activity has no effect on tropospheric warming. Again this is very very basic. You could do other things like create a linear mixed model but I won't get into that. |
Users browsing this thread: |
1 Guest(s) |
The Jungle is self-supported by showing advertisements via Google Adsense.
Please consider disabling your advertisement-blocking plugin on the Jungle to help support the site and let us grow!
We also show less advertisements to registered users, so create your account to benefit from this!
Please consider disabling your advertisement-blocking plugin on the Jungle to help support the site and let us grow!
We also show less advertisements to registered users, so create your account to benefit from this!
Questions or concerns about this ad? Take a screenshot and comment in the thread. We do value your feedback.