PLEASE HELP Researchers at an auto insurance company are studying the ages of its policyholders and the number of accidents per 100 policyholders. The researchers compared each year of age from 16 to 45. After analyzing the data, the researchers found that as age increases, the number of accidents per 100 policyholders decreases. The variable(s) (select) . The (select) age corresponds to a (select) number of accidents per 100 policyholders, so there is a (select) correlation. Causation is (select) . It is possible that the age of the driver causes safer driving and therefore fewer accidents because of experience and maturity. However it is also possible that both the age group and accident rate depend on another variable such as likelihood of living in the city or likelihood of driving a car with antilock brakes or other advanced safety features.

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