Answer
Yes, the evidence suggests that the volume of Apple stock has changed since 2007.
Work Step by Step
Here we have: $H_{o}$: μ =35.1, $H_{1}: μ \ne 35.1$, n = 40, x̅ = 23.6, s = 11.7 and α = 0.05
Using the Classical approach:
Using Table VI, we have: t = +/- 2.023
Since this is a two-tailed test, the rejection region will be values smaller than -2.023 and greater than 2.023.
$σ_{ x̅} = \frac{s}{\sqrt n} = \frac{11.7}{\sqrt 40} = 1.85$
$t = \frac{23.6 - 35.1}{1.85} = -6.216$
Since, -6.216 < -2.023, we reject the Null hypothesis.
