Flashcards
Stats 151 - Assigning Probability to Events
Flashcards do conjunto (14)
- 1What is probability?A number associated with a random event
- 2When do we use the uniform probability model?When all outcomes are equally likely
- 3What is AUB when calculating probability for compound events?Includes all outcomes where Either A or B or both occur
- 4What is AUBc?All outcomes that don't include A or B
- 5A upside down U BAll outcomes that include A and B
- 6How do you find the probability of both a and b if there are 42 A and 9 B out of 100 people?42/100 + 9/100 = 0.51
- 7What is an independent event?The probability of A occurring is not effected by B
- 8How do you find the probability of A and B happening if A and B are independentP(AUB) = P(A) + P(B) - P (AUB)
- 9an urn contains 5 white balls and 10 black balls. tow balls are draw without replacement meaning you put the ball back after you draw it. What is the probability you will draw two white balls?5/15 = first draw 5/15 = 2nd draw
5/15 * 5/15 = probability - 10What if you dont put the ball back in after you draw it?5/15 * 4/15
- 11There are three radar guns that have a 0.02 probability that they wont detect a plane. What is the probability none will go off?(0.2)cubed = 0.0008
- 12What is the likelihood at least one will detect the plane?1 - 0.0008 = 0.9992
- 13What is the likelihood all three will go off?(0.98)cubed = 0.9412
- 14there are two fire alarms, one with a 0.95 change of detecting smoke and one with a 0.90 chance of detecting heat. What is the likelihood at least one alarm will go off?P(A) + P(B) - P(A) * P(B) = 0.95 + 0.90 - (0.95 *0.90) = 0.995
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- Chemistry 101 Stats 151 FlashCards sobre Stats 151 - Assigning Probability to Events, criado por jennabarnes12387 em 23-01-2014.
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