1. If I let X be a random variable where each X is a roll of fair 6-sided dice, what is E[X]? Note: You will be calculating the population average since you know the probability distribution of this RV X. (Hint: you should first write down the probability distribution for this RV X, then it should be straightforward to calculate E(X).)

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

What fraction is equivalent to 0.46464646··· a. 46⁄99 b. 46⁄999 c. 46⁄100 d. 23⁄50

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