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?

The correct answer is:

We can be 95% confident that the true proportion of votes for the Conservative property will fall within 4 points of 68%, or the interval 64% - 72%.

Explanation:

The confidence level (95%) tells us the chance that our interval contains the true proportion.

The margin of error (4%) gives us the interval above and below the mean percentage given.

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5