The following table shows 1000 nursing school applicants classified according to scores made on a college entrance examination and the quality of the high school from which they graduated, as rated by a group of educators:
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The following table shows 1000 nursing school applicants classified according to scores made on a college entrance examination and the quality of the high school from which they graduated, as rated by a group of educators:
Score
Low (L) Medium (M) High (H)
Poor (P) 105
70 25
Average (A) 60
175 65
Superior (S) Total 55 220
145 390 300 390
Quality of High Schools
Total
200
300
500 1000
88 CHAPTER 3
SOME BASIC PROBABILITY CONCEPTS
8. 9.
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(a) Calculate the probability that an applicant picked at random from this group:
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Made a low score on the examination.
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Graduated from a superior high school.
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Made a low score on the examination and graduated from a superior high school.
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Made a low score on the examination given that he or she graduated from a superior high
school.
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Made a high score or graduated from a superior high school.
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(b) Calculate the following probabilities:
1. P(A) 2. P(H) 3. P(M)4. PðA j HÞ 5. PðM \ PÞ 6. ðH j SÞ
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