Question

what is the null and alternative hypothesis for these two health questions?

Health question 1 Determining the effects of position change on the acute complications of coronary angiography

Health questions 2 compare patient outcome of vascular complications, back pain, and urinary discomfort between patients ambulatory 12-24 hours post-transfemoral cardia catheterization

Answer 1

Health questions 1

The null hypothesis H₀: coronary angiography does not effects the position change on the acute complications (i.e. µ=µ₀)

The alternative hypothesis H₁: coronary angiography effects the position change due to the acute complications (i.e. µ≠µ₀)

Health questions 2

The null hypothesis H₀: There is no effect on health due to post-transfemoral cardia catheterization (i.e. µ_x=µ_y)

The alternative hypothesis H₁:There is some effects on health due to post-transfemoral cardia catheterization (µ_x≠µ_y)

Where µ_{x &} µ_y are the mean effects due to treatment (before and after treatment)