A national survey of adult citizens of a nation found that % dreaded Valentine's Day. The margin of error for the

survey was percentage points with % confidence. Explain what this means.

1000 20

7.1 85

Which statement below is the best explanation?
A. There is 85% confidence that 20% of the adult citizens of the nation dreaded Valentine's Day.
B. In % of samples of adult citizens of the nation, the proportion that dreaded Valentine's Day
is between and .
85
0.129 0.271
C. There is % confidence that the proportion of the adult citizens of the nation that dreaded
Valentine's Day is between and .
85
0.129 0.271
D. There is % to % confidence that % of the adult citizens of the nation dreaded
Valentine's Day.
77.9 92.1

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

Let f(x) = 1/x^2 (a) use the definition of the derivatve to find f'(x). (b) find the equation of the tangent line at x=2