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A certain injection administered to 12 patients resulted in the following changes of blood pressure: 5, 2, 8, -1, 3, 0, 6, -2, 1, 5, 0, 4. Also check the following.
written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k modified 21 months ago by gravatar for sagarkolekar sagarkolekar ★ 11k

Can it be concluded that the injection will be in general accompanied by an increase in blood pressure?
engineering mathematics
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written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.8 years ago

$$N = 12 ( < 30, 20 \ it \ is \ a \ small \ sample)$$

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Step 1 :

Null hypothesis ($H_0)\ :\ {\mu }_1=0\ (\ i.e.\ the\ injection\ is\ not\ accompanied\ by\ an\ increase\ in\ blood\ pressure)$

Alternative hypothesis : ${\mu }_1\lt0\ (\ i.e.\ the\ injection\ is\ \ …

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