Perform the following hypostasis tests. May use calculator to check answers. 1. Weyerhauser claims the average...

 

 

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Perform the following hypostasis tests. May use calculator to check answers. 1. Weyerhauser claims the average age of the trees they use to make wood and paper products is 11.5 years. It is known that the standard deviation of the age of the trees is 3.2 years. You analyze 60 trees and find the mean age to be 12.9 years. At the a= .05 level is there enough evidence to support a claim the actual average age is different than the stated average? a. Ho= H: b. One tail or two tail test? (Choose one) C. Find Z (test statistic) d. What are your rejection zone(s) e. P-value f. Accept or Reject HO and why: 2. The DNC claims that 80% of Philadelphians vote democrat. You survey 1000 random Philadelphians of voting age and find 740 vote democratic. At the a-.05 level does your survey negate their claim? b. One tail or two tail test? (Choose one) c. Find Z (test statistic) d. What are your rejection zone(s) e. P-value f. Accept or Reject HO and why: Perform the following hypostasis tests. May use calculator to check answers. 1. Weyerhauser claims the average age of the trees they use to make wood and paper products is 11.5 years. It is known that the standard deviation of the age of the trees is 3.2 years. You analyze 60 trees and find the mean age to be 12.9 years. At the a= .05 level is there enough evidence to support a claim the actual average age is different than the stated average? a. Ho= H: b. One tail or two tail test? (Choose one) C. Find Z (test statistic) d. What are your rejection zone(s) e. P-value f. Accept or Reject HO and why: 2. The DNC claims that 80% of Philadelphians vote democrat. You survey 1000 random Philadelphians of voting age and find 740 vote democratic. At the a-.05 level does your survey negate their claim? b. One tail or two tail test? (Choose one) c. Find Z (test statistic) d. What are your rejection zone(s) e. P-value f. Accept or Reject HO and why: