a. Let Y be the random variable that counts the number of sixes which occur when a die is tossed 10 times. Wht type of random variable is Y? What is $P(Y=3)? What is the expected number of sixes?

ook int rences American households increasingly rely on cell phones as their exclusive telephone service. It is reported that 49.2% of American households still have landline phone service. We decide to randomly call eight households and ask if the home has a landline phone. a-1. What is the random variable? The random variable is the count of the a-2. How is the random variable distributed? The random variable follows a binomial Probability 8 households that have a land line. probability distribution. N b. What is the probability that none of the households in the sampled group have landline phone service? (Round your answer to 4 decimal places.)

A description of the distribution of the values of a random variable and their associated probabilities is called a probability distribution random variance random variable expected value

Blood Types and Rh Factors In addition to being grouped into four types, human blood is grouped by its Rhesus (Rh) factor. Consider the figures below that show the distributions of these groups for Americans. A B АВ Rh + 37% 34% 10% 4% Rh - 6% 6% 2% 1% Source: www.infoplease.com Send data to Excel Choose 1 American at random. Find the following probabilities. Enter your answers as decimals rounded to 3 decimal places.