Some Review Questions 20. List 3 approaches to probability. 21. What does the re

Question

Some Review Questions 20. List 3 approaches to probability. 21. What does the relative frequency approach say 22. What are the values probability can never b 23. W 24. Can a 200% probability be correct? why yes or why no? 25. What are the two tests for independence? 26. What are the magic words in probability? And what are their symbols? 27. What would you say if someone told you that the probability of snow in June is-95%? 28. Draw a Venn Diagram for the student at NJCU showing that some major in computer and some in business but nobody in both 29. The same as in 028 but in some are majoring in both. 30. Give an example of two mutually exclusive events. 31. Give an example of two dependent events and explain what doesit mean. hat does a probability of zero tell you? 32. Given a population of 5 letters A, B, C, D,E Q) How can you tell in advance how many arrangements of size 2 can be obtained if a) No replacement b) Order counts and list them out 33. Same as Q32 but order does not count.

Explanation / Answer

22:

A probability can take values between 0 and 1 (inclusive). That is probability cannot take values less than 0 and greater than 1.

23:

The probability of an impossible event is zero. That is if an event has probability zero then it will be an impossible event.

24:

200% means 2 (in decimal). A probability can take values between 0 and 1 (inclusive). So this is an incorect probability.

25:

The two test of independence for event A and B are :

Events A and B are event if and only if

P(A and B) = P(A) P(B)

and

P(A|B) = P(B) or P(B|A) = P(B)

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