Two couples decide to eat out at a fancy restaurant. For Couple A, the probability that the guy forgets to bring money is 10%; the probability that the girl forgets is the same. For Couple B, the probability that the guy forgets to bring money is 7%; the probability that the girl forgets is the same. The event of forgetting to bring money is independent among all four individuals. Given that exactly two individuals forgot to bring money, calculate the probability that it was the two guys.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed