If the average defect rate (# of scratches) for a randomly selected desk is 5, what is the probability of observing 7 or more scratches on a randomly selected desk?

approximately .2378

approximately .1334

approximately .0681

approximately .8666

All of the choices above

None of the choices

If the average defect rate (# of scratches) for a randomly selected desk is 5, what is the probability of observing more than 7 scratches on a randomly selected desk?

approximately .2378

approximately .1334

approximately .0681

approximately .8666

All of the choices above

None of the choices

If there are 23 defective items within a population of 1,000 items, what is the probability of observing 3 or fewer defects in a sample of 50 items? (Note: You may not use one distribution as an approximation for another distribution.)

.9721

.9758

approximately .9721

approximately .9758

All of the choices above

None of the choices

The binomial distribution _____.

is used when there are two modes

can be used to predict the number of successes within a fixed number of trials

can be used to predict the number of trials before the first success

can be used to predict the number of defects within a square meter of upholstery

All of the choices above

None of the choices

The uniform discrete probability distribution is used _____.

when we know that the probability of each possible outcome is identical

when we have no reason to believe that any outcome is more likely than any other outcome

when we use Excel to generate random numbers with equal probabilities of occurring

All of the choices above

None of the choices