It has been reported that 18.3% of all u. s. households were heated by electricity in 1980, compared to 27.4% in 1995 and 31.5% in 2005. if we are to test whether the population percentage could be equal for these years at the 0.05 level, and assuming a sample size of 1000 u. s. households for each year, what is the calculated chi square value

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.

3

step-by-step explanation:

the answer is: -22 also a

hope i

-lavira: )