A random digit dialing sample of 2092 adults found that 1318 used the internet. Of the users, 1041 said that they expect businesses to have Web sites that give product information. In your Business Economics class at school your teacher said that 80% of all people believe this. What is the appropriate z-value to use in this situation

Step-by-step explanation:

It was given that, the ellipse has directrices at

The directrices has equation: , where is the eccentricity of the ellipse.

eqn(1)

The foci are at: (0,1) qnd (0,-1)

Also, the foci are given by:

eqn(2)

Solving equation (1) and (2) simultaneously we get;

and

We use the relation, to get:

.

The equation of the ellipse is given by:

We substitute the values to get:

Or