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.
all answers 6 null hypothesis are never accepted we either reject them or fail to reject them the distinction between acceptance and failure to reject is best understood in terms of confidence intervals failing to reject a hypothesis means a confidence interval contains a value of no difference however the data may also be consistent with differences of practical importance hence failing to reject the null hypothesis does not mean that we have shown that there is no difference accept the null hypothesis