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Who eats breakfast? The two-way table describes the 595 students who responded to a school survey about eating breakfast. Suppose we select a student at random. Consider events B: eats breakfast regularly, and M: is male.

(a) Find P(B|M) Explain what this value means.

(b) FindP(M|B) Explain what this value means.

Short Answer

Expert verified

Part (a)P(B|M)=0.5938

Part (b)P(M|B)=0.6333

Step by step solution

01

Part (a) Step 1. Given Information

The adjusted gross income (in thousands of dollars) reported on individual federal income tax returns in a recent year is distributed as follows:

02

Part (a) Step 2. Concept Used

The number of favorable outcomes divided by the total number of possible outcomes equals probability. As a result, the following is a definition of condition probability: P(A|B)=P(AandB)P(B)

03

Part (a) Step 3. Calculation

The person eats breakfast on a regular basis, according to the inquiry. Now we must determine the likelihood that the result for "male" is correct.

Therefore,

P(BandM)=favourableoutcomespossibleoutcome=190595

P(M)=favourableoutcomespossibleoutcomes=190+130595=320595

As a result, the conditional probability is:

P(B|M)=P(BandM)P(M)=190320≈0.5938

As a result, the likelihood that the result for "male" is P(B|M)=0.5938

04

Part (b) Step 1. Calculation

The person in issue is a man, according to the inquiry. Now we must determine the likelihood that the result for "eats breakfast on a regular basis" is correct. Therefore,

P(BandM)=favorableoutcomespossibleoutcomes=190595

P(M)=favourableoutcomespossibleoutcomes=190+130595=320595

As a result, the conditional probability is:

P(BandM)=favourableoutcomespossibleoutcomes=190595

P(B)=favourableoutcomespossibleoutcomes=190+110595=300595

As a result, the conditional probability is: P(M|B)=P(BandM)P(B)

P(M|B)=190/595300/595=190300≈0.6333

As a result, there's a good chance that the result for "eats breakfast regularly" will be positiveP(M|B)=0.6333

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