Suppose an opinion poll predicted that, if the election were held today, the Conservative party would win 68% of the vote. If the pollster attached a 95% confidence level to the interval 68% plus or minus 4%, what would that mean?

A.

That there is a 95% chance that the Conservative party will win between 64% and 72% of the vote.

B.

That there is a 99% chance that the Conservative party will win 68% of the vote.

C.

That there is a 95% chance that the Conservative party will win 4% of the vote.

D.

That there is a 95% chance that the Conservative party will win 68% of the vote.

answer: the correct one is a

step-by-step explanation:

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.