How's the economy? A polister wants to construct an 80% confidence interval for the proportion of adults who believe that economic conditions are getting better.
Part 1 of 2
(a) A poll taken in July 2010 estimates this proportion to be 0.41. Using this estimate, what sample size is needed so that the confidence interval will have
a margin of error of 0.01?
A sample of 3976 adults is needed to obtain an 80% confidence interval with a margin of error of 0.01.
Part: 1/2
Part 2 of 2
(b) Estimate the sample size needed if no estimate of p is available.
A sample of adults is needed to obtain an 80% confidence interval with a margin of error of 0.01.
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aşk to your elder brother.he may solve it

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is