1 OneSample T Dry weight of cork 5 points Test of 3275 vs

1.   One-Sample T: Dry weight of cork (5 points)

Test of = 3.275 vs < 3.275

Variable N Mean StDev SE Mean 95% Upper Bound T P

Dry weight of cork 20 3.2685 0.2791 0.0624 3.3764 -0.10 0.459

a.   State your decision and conclusion. Show how you arrived at your decision.

Solution

A.

As the P value is too big, P = 0.459, it is surely greater than the significance level (although I cannot see the significance level here, it\'s typically at most 0.10).

We only reject the null hypothesis if P < significance level.

Thus, as P > significance level, WE FAIL TO REJECT THE NULL HYPOTHESIS.

Thus, we conclude that u = 3.275. [ANSWER, or there is no significant evidence that the mean is greater than 3.275]