1 The total project cost for a Trex deck ranges between $1,500 and $2,200 for a 250sf deck. 2  Trex Select of basic quality averages approximately $7/sf.  Trex Enhance of higher quality is approximately $8/sf.
When the hypothesized value is zero then there is a simple relationship between hypothesis testing and confidence intervals: If the interval contains zero then the null hypothesis cannot be rejected at the stated level of confidence. If the interval does not contain zero then the null hypothesis can be rejected.
1 P = 0.05 does not mean there is only a 5% chance that the null hypothesis is true. 2  P = 0.05 does not mean there is a 5% chance of a Type I error (i.e. false positive).3  P = 0.05 does not mean there is a 95% chance that the results would replicate if the study were repeated.-values have been criticised because they are widely misunderstood and don't tell scientists what they want to know. Goodman (2008) has written a nice article on the misinterpretation of p-values, and here are a few examples: 1  P = 0.05 does not mean there is only a 5% chance that the null hypothesis is true.