knees are often the source of pain which of the following te

knees are often the source of pain, which of the following tests should be used to determine if a new knee strap reduces the amount of pain?

two sample z test for proportions
chi squared

two sample t (unpooled)
two sample t (pooled)

paired t test

Solution

Here reaseacher should randomly select some patients with knee pain. And observ the amount pain before and after new knee strap. That is we will have matched pair of observations . So here paired sample t-test should be used.