A soft drink company holds a contest in which a prize may be revealed on the inside of the bottle cap. The probability that each bottle cap reveals a prize is 0.2 and winning is independent from one bottle to the next. What is the probability that a customer must open three or more bottles before winning a prize?
a. (0.2)(0.2)(0.8) = 0.032
b. (0.8)(0.8)(0.2) = 0.128
c. (0.8)(0.8) = 0.64
d. 1 - (0.2)(0.2)(0.8) = .968
Question 2
Which statement is not true about the 95 confidence level?
a. Confidence intervals computed by using the same procedure will include the true population value for 95 of all possible random samples taken from the population.
b. The procedure that is used to determine the confidence interval will provide an interval that includes the population parameter with probability of 0.95.
c. The probability that the true value of the population parameter falls between the bounds of an already computed confidence interval is roughly 95.
d. If we consider all possible randomly selected samples of the same size from a population, the 95 is the percentage of those samples for which the confidence interval includes the population parameter.
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