BUAL 2600 Exam 2 Gupta Questions and Answers | Updated 2026 | Guaranteed Pass

BUAL 2600 Exam 2 Gupta Questions and Answers | Updated 2026 | Guaranteed Pass A ________ is a measure of the chance that an uncertain event will occur. - answerprobability The ________ of two events X and Y is another event that consists of the sample space outcomes belonging to either event X or event Y or both events X and Y. - answer-union P(AUB) = P(A) + P(B) − P(A∩B) represents the formula for the ________. - answeraddition rule A process of observation that has an uncertain outcome is referred to as a(n) ________. - answer-experiment A probability may be interpreted as a long-run ________ frequency. - answer-relative A(n) ________ probability is a probability assessment that is based on experience, intuitive judgment, or expertise. - answer-subjectiveProbabilities must be assigned to sample space outcomes so that the probability assigned to each sample space outcome must be between ________, inclusive. - answer-0 and 1 Which of the following is a valid probability value for a discrete random variable? - answer-.2 The variable Employment Status, which can take either the value 1 for Employed or 0 for Unemployed, is an example of a ________ random variable - answer-discrete If x is a binomial random variable, then the standard deviation of x is given by - answer-√npq. A discrete variable that can often be used to describe the number of occurrences of an event over a specified interval of time or space is a ________ random variable. - answer-Poisson A random variable that is defined to be the total number of successes in n trials is a ________random variable - answer-binomial When p = .5, the binomial distribution will ________ be symmetric - answer-always A fair die is rolled 10 times. What is the average number of even number outcomes? - answer-5 (Binomial mean = μ = np = 10(.5) = 5) A fair die is rolled 36 times. What is the standard deviation of the even number (2, 4, or 6) outcomes? - answer-3 (Binomial standard deviation = σ = √(npq) = √[(36)(.5)(.5)] = √9 = 3)The probability that a given computer chip will fail is .02. Find the probability that of 5 delivered chips, exactly 2 chips will fail - answer-.0038 (P(X) = n!/[x!(n − x)!] × px(1 − p)n−x, for x = 2, n = 5, p = .02) The J.O. Supplies Company buys calculators from a non-U.S. supplier. The probability of a defective calculator is 10 percent. If 100 calculators are selected at random, what is the expected number of defectives? - answer-10 (E[X] = μx = (.10)(100) = 10) A study shows that employees who begin their workday at 9:00 a.m. vary their times of arrival uniformly from 8:40 a.m. to 9:30 a.m. The probability that a randomly chosen employee reports to work between 9:00 and 9:10 is - answer-20 percent (P (9:00 x 9:10) = 10 min/50 min = 1/5 = 20%) If the random variable x is normally distributed, ______ percent of all possible observed values of x will be within three standard deviations of the mean - answer- 99.73 The z value tells us the number of ________ that a value of x is from the mean. - answer-standard deviations A continuous probability distribution having a rectangular shape, where the probability is evenly distributed over an interval of numbers is a(n) ________ distribution. - answer-uniform The specific shape of each normal distribution is determined by its ________ and ________. - answer-mean, standard deviation The specific shape of each normal distribution is determined by its ________ and ________. - answer-z score A normal distribution with mean equal to zero and a standard deviation equal to one is called the ________ normal distribution. - answer-standardThe thickness of a randomly selected metal piece is a ________ random variable - answer-continuous