C) a researcher has extracted two samples from the same target population, sample a and sample b. sample a has a mean of 25 kg while sample b has a mean twice that of sample a. sample size of sample a is three times more than that of sample b. sum of sample sizes is 60. calculate:
i. mean of sample b (1mark)
ii. sample size of sample a and sample b (2 marks)
iii. summation of x variables for sample a and sample b (4 marks)
iv. standard deviation of sample a and sample b, consider ungrouped data (5 marks)

yes

step-by-step explanation:

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.

the answer is 62.8 cubic units