Drinking tea appears to offer a strong boost to the immune system. In a study of 10 participants, blood samples were taken before and after one week of drinking 5 cups of tea a day (the participants did not drink tea prior to the study) and the levels of interferon gamma were measured, which is a molecule that fights bacteria, viruses, and tumors. The mean production went from 155 pg/mL to 448 pg/mL after drinking tea. The mean difference for the ten subjects is 293 pg/mL (Post-Pre Measurement) with a standard deviation of the differences of 252 pg/mL. Required:
Use the information to test whether mean production of interferon gamma as a response to bacteria is significantly higher after drinking tea than before drinking tea.

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.

a

step-by-step explanation: