7 8 9 18. (5pt) If P(A) = 0.80. P(B) = 0.5, can A and B be mutually exclusive? a

Question

7 8 9 18. (5pt) If P(A) = 0.80. P(B) = 0.5, can A and B be mutually exclusive? a) No c) Maybe d) Sometimes Use the following to answer the next two questions. Suppose P(AIB)-0.60. p(AIB') = 0.70 and P(B)-0.6 19. (5pt) P(A) is equal to .60 C a) 0.64 b) 0.40 036 oaz0 dANone of the above 20. (5pt) P(B|A) equals to 0.3600 b) 0.2304 c) 0.5625 d) None of the above 21. (5pt) A quantity computed using the data in a sample is called erin )a parameter b) a statistic c) a measure of central tendency d) a measure of spread 2. (5pt) Suppo se that for a given data set, the least squares regression line is

Explanation / Answer

Q 18

P(A) = 0.80, P(B) = 0.5

For mutually exclusive events

P( A U B) = P(A)+P(B) = 0.8+0.5 = 1.3, probability greater than 1 is not possible, Hence, the they can not be mutually exclusive events

Answer: No

Q 19 Wrong data given P(B) =0.6 cannot be possible

P(A|B) cannot be equal to P(B)

Q 21 Answer : statistic

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