Suppose you and a friend are playing a game that involves rolling a fair die. You roll the die and count how many times you must roll until you roll a 6.
Zoologists estimate that a randomly selected baby giraffe has a 32% chance of surviving to adulthood. Assume this estimate is correct. Suppose researchers select 100 baby giraffes at random to tag and monitor. Let X = the number that survive to adulthood.
✔ YesNo
✔ YesNo
✔ YesNo
✔ YesNo
Yes ✔ No
✔ YesNo
The makers of a certain diet cola claim that its taste is identical to the full-calorie version. To test this claim, a researcher recruits 175 volunteers, has them drink samples of both colas from identical cups in a randomized order, and then asks them to identify which sample is the diet cola. If we assume that the volunteers truly cannot tell the difference, then the probability that they correctly identify the diet cola is 0.5. Let X = the number of volunteers who correctly identify the diet cola.
✔ YesNo
✔ YesNo
✔ YesNo
Zoologists estimate that a randomly selected baby giraffe has a 32% chance of surviving to adulthood. Assume this estimate is correct. Suppose researchers select 100 baby giraffes at random to tag and monitor. X, the number of these giraffes that survive to adulthood, is a binomial random variable.
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4.6648
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6.6144
A spinner has two colored regions — purple and orange — and is divided in such a way so that the probability that the spinner lands on purple is 0.9. Suppose we spin the spinner 12 times and let X = the number of times it lands in the purple region.
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1.0392
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