Suppose that in a given town, 60% of the population is under age 40 (event A). It is found that the proportion of residents under age 40 who support mandatory inoculation is 0.72. The proportion of residents over age 40 who support mandatory inoculation is 0.52. Let event B = support mandatory inoculation. Are the events A, B mutually exclusive? O No, they are not because P(A) does not equal P(A|B) O No, they are not because P(AN B) does not equal zero(0) O Yes, they are because P(AU B) = P(A) + P(B) O Yes, they are because P(AU B) = P(A) × P(B)

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QUESTION 20
Suppose that in a given town, 60% of the population is under age 40 (event A). It is found that the
proportion of residents under age 40 who support mandatory inoculation is 0.72. The proportion of
residents over age 40 who support mandatory inoculation is 0.52. Let event B = support mandatory
inoculation.
Are the events A, B mutually exclusive?
O No, they are not because P(A) does not equal P(A|B)
O No, they are not because P(A NB) does not equal zero(0)
O Yes, they are because P(A UB) = P(A) + P(B)
O Yes, they are because P(AUB) = P(A) × P(B)
Transcribed Image Text:QUESTION 20 Suppose that in a given town, 60% of the population is under age 40 (event A). It is found that the proportion of residents under age 40 who support mandatory inoculation is 0.72. The proportion of residents over age 40 who support mandatory inoculation is 0.52. Let event B = support mandatory inoculation. Are the events A, B mutually exclusive? O No, they are not because P(A) does not equal P(A|B) O No, they are not because P(A NB) does not equal zero(0) O Yes, they are because P(A UB) = P(A) + P(B) O Yes, they are because P(AUB) = P(A) × P(B)
Expert Solution
Step 1

 

Supports inoculation

Doesn’t support inoculation

Total

Under 40

0.72 * 0.60 = 0.432

0.6 – 0.432 = 0.168

0.6

40 and over

0.52 * 0.40 = 0.208

0.4 – 0.208 = 0.192

1 – 0.6 = 0.4

Total

0.64

0.36

1

P(Under 40) ≠ P(Under 40 | Supports inoculation). This means the events Age and Support for inoculation are not independent.

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