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BUAL 2600 ( / ) EXAM ( GUPTA QUESTIONS AND
ANSWERS
We have an expert-written solution to this problem!A fair die is rolled 36 times. What is the standard deviation of the even number (2, 4, or 6) outcomes?
- (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 .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?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 20 percent (P (9:00 < x <9:10) = 10 min/50 min = 1/5 = 20%)
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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
99.73
The z value tells us the number of ________ that a value of x is from the mean.
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.uniform
The specific shape of each normal distribution is determined by its ________ and ________.mean, standard deviation
The specific shape of each normal distribution is determined by its ________ and ________.z score
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