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.
At the 0.01 level of significance, we would reject the null hypothesis. Answer: False Difficulty: Hard Goal: 2 AACSB: AS. 12. For the hypothesis test, , with n1 = 4 and n2 = 4, the F-test statistic is 50.01. At the 0.01 level of significance, we would reject the null hypothesis. Answer: True Difficulty: Hard Goal: 2. 13. For the hypothesis test, , with n1 = 7 and n2 = 7, the F-test statistic is 2.56. At the 0.05 level of significance, we would reject the null hypothesis. Answer: False Difficulty: Hard Goal: 2. 14. For the hypothesis test, , with n1 = 9 and n2 = 9, the F-test statistic is 4.53.