The symptoms of a sty are. foreign body sensation in the eye (particularly with blinking), eye pressure, and; pain in the area of the bump, though often they are painless. There may also be blurred vision if thick sebum or pus from within the sty spreads over the eye's surface. If chronic meibomian gland dysfunction is present, dry eye symptoms are common.
Paired t-test. This tutorial will walk you through the use of the paired t-test. The paired t-test should be used when the data are in pairs. One of the most common uses of this test is a before- and after- (pre and post) analysis. For example, we might be interested in how much a certain group grows after fertilizer is added to randomly selected plots.
To do this, you enter data as âmatched pairsâ of pre- and post-scores for each individual. If you cannot match the tests, you should run an independent sample t-test. The database is set up differently for these two types of tests, so refer to the user manual for your statistical package before entering data.