About 90% of young adult Internet users (ages 18 to 29) use social-networking sites. (a) Suppose a sample survey contacts an SRS of 1700 young adult Internet users and calculates the proportion pˆ in this sample who use social-networking sites. What is the approximate distribution of pˆ?

With the following parameters

The mean is given by:

And the standard error is given by:

Step-by-step explanation:

For this case we know that we have a sample size n = 1700

And the estimated proportion of young adult Internet users is 0.9

We can check the conditions in order to use the normal approximation:

1) np = 1700*0.9 = 1530>10

2) n(1-p) = 1700*(1-0.9)= 170>10

3) Randomization: The data comes from a random sample

For this case we assume that the three conditions are satisfied so then the normal approximation is useful and for this case is given by:

With the following parameters

The mean is given by:

And the standard error is given by:

pretty sure 750 each month!

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.