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 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.

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

maya’s expression will generate the wrong sum because she violated the commutative property.

step-by-step explanation: