Introduction to Random Variables Answers

A fair coin will be tossed 3 times. Let the random variable X = the number of tails among the

A fair coin will be tossed 3 times. Let the random variable X = the number of tails among the

A pair of fair dice will be rolled. Let the random variable X = the sum of the numbers shown on their faces. The probability distribution of X is given in the table.

The final letter grades earned by students in a large psychology class were converted to grade points in order to calculate the students’ GPAs. An A = 4 points, a B = 3 points, etc. Let the random variable X = the grade point earned by a randomly selected student. The probability distribution of X is given in the table.

A pair of fair dice will be rolled. Let the random variable X = the sum of the numbers shown on their faces. The probability distribution of X is given in the table.

A farming council takes a large random survey of US adults in which they ask how many times they ate a cruciferous vegetable such as broccoli, cauliflower, or cabbage in the last 7 days.Let the random variable X be the number of days a randomly selected respondent reported eating one of these vegetables.The probability distribution of X and several choices of histograms are shown here.Which histogram correctly displays the probability distribution of the random variable X, the number of days a randomly selected respondent reported eating a cruciferous vegetable?

Identify the shape of the probability distribution histogram.

Identify the shape of the probability distribution histogram: