Answer
we have n = 3, x̅ = 1.915, s = 1.050, df = 2
$s_{x̅} = \frac{1.050}{\sqrt 3} = 0.606$
$t = \frac{1.915-0}{0.606} = 3.16$
Using Table C of the book we have:
0.025 < P < 0.05
Since P < 0.05, we will reject the Null Hypothesis. Hence, we have sufficient evidence that trees grow faster when CO2 is pumped.
Work Step by Step
Use minitab to determine mean and Stdev.
