# Question

In a recent assessment test given by the Department of Education, approximately 55% of high school seniors did not show even “basic knowledge” of American history. In fact, a substantial number of them didn’t know which side won the American Civil War. If this 55% figure is accurate, how likely is it that a sample of 20 students will produce?

a. Exactly 10 students who lack basic knowledge of American history?

b. No more than five students who lack basic knowledge of American history?

c. Between 13 and 17 students who lack basic knowledge of American?

d. For the random variable “number of students in a sample of 20 who lack basic knowledge of American history,” compute the expected value and the standard deviation.

a. Exactly 10 students who lack basic knowledge of American history?

b. No more than five students who lack basic knowledge of American history?

c. Between 13 and 17 students who lack basic knowledge of American?

d. For the random variable “number of students in a sample of 20 who lack basic knowledge of American history,” compute the expected value and the standard deviation.

## Answer to relevant Questions

NASA is planning a deep space probe involving extensive scientific experimentation. The guidance system for the space vehicle is obviously critical. The system is comprised of six independent components, each of which must ...The Fred Meyer store in Portland has just received a large shipment of fitted baseball caps from Gradient Sporting Goods. In previous orders, a number of the hat sizes have been mislabeled. Because of this, the shipping and ...Traffic exiting the Arlington Turnpike at Exit 123 conforms roughly to the Poisson conditions. The average number of cars exiting is 6 per minute. Compute the probability of a. exactly 4 cars exiting during the next minute ...Use the binomial and the Poisson tables to compute and compare the binomial probabilities and the approximating Poisson probabilities for the following cases: a. P(x = 2), where n = 10, p = .05 b. P(x = 1), where n = 30, p = ...Cell phone usage in Vietnam has grown dramatically in the last few years, drawing the interest of a number of international telecommunications companies. A study done by the country’s Communications Ministry reports that ...Post your question

0