Which of the following statement is true about a sampling distribution A. it is the probability distribution of a parameter B. it is used for making inferences about a population C. it gives probabilities for a parameter D. it is used for making inferences about a sampl

All human blood can be "ABO-typed" as one of O, A, B, or AB, but the distribution of the types varies a bit among groups of people. Here is the distribution of blood types for a randomly chosen person in a country. Blood type A National probability 0.43 0.12 AB ? (a) What is the national probability of type AB blood? O 0.41 (b) Maria has type B blood. She can safely receive blood transfusions from people with blood types O and B. What is the probability that a randomly chosen person from this country can donate blood to Maria?

The time required to prepare a certain specialty coffee at a local coffee shop is uniformly distributed between 35 and 75 seconds. Assuming a customer just ordered one of these specialty​ coffees, determine the probabilities described below.   a. What is the probability that the preparation time will be more than 48 ​seconds? simplify your answer b. What is the probability that the preparation time will be between 43 and 71 ​seconds? c. What percentage of these specialty coffees will be prepared within 61 ​seconds? d. What is the standard deviation of preparation times for this specialty coffee at this​ shop?

Suppose that 84% of all customers who use the service department at a certain automotive dealership would recommend the service to a friend. A random sample of 50 customers is taken. Canwe use the Normal distribution to compute probabilities about the sample proportion of thosewho would recommend the service to a friend? Why or why not?

A new boarding policy has been proposed by an airline. Frequent flyers and non-frequent flyers were asked for their opinions, and the results are summarized in the table shown here. Find the probability a person chosen at random from among the people surveyed favors the new policy and is a frequent flyer. Enter your answer correctly to two decimal places. Remember, a probability is expressed as a number between zero and one, inclusive. Opinion on Policy In Favor Of (A) Neutral (B) Opposed To (C) Frequent Fliers (D) 48% 23% 4% 75% Non-Frequent Fliers (E) 15% 3% 7% 25% 63% 26% 11% 100%

A probability distribution function has which characteristic(s)? (Select all characteristic that applies.) Each probability is between zero and one, inclusive. Each probability is larger than one. The sum of the probabilities is one. The sum of the probabilities is larger than one.

A car dealer is trying to sell five used cars. She attempts to sell a car to each customer that walks in. Suppose that only 7% of all the potential customers are willing and able to purchase a car, and assume that each customer acts independently of one another. Let X denote the number of customers that walk in before all five cars are sold. What is the distribution of X? What is the probability that the last car is sold to the 100th customer?