Answer
Since we reject the Null hypothesis, the mean weight loss of 0.9 pound is significant.
Work Step by Step
Here we have: $H_{o}$: μ = 0, $H_{a}$: μ > 0, n = 950, x̅ = 0.9, s = 7.2 and α = 0.10
Using the Classical approach:
Using Table VI, we have: t = 1.282
$σ_{ x̅} = \frac{s}{\sqrt n} = \frac{7.2}{\sqrt 950} = 0.234$
$t = \frac{0.9 - 0}{0.234} = 3.853$
Since, 3.853 > 1.282, we will reject the Null hypothesis.
