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The Practice of Statistics | 5th Edition | ISBN: 9781464108730 | Authors: Daren S. Starnes, Josh Tabor
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Section I: Multiple Choice Choose the best answer for each question. Records from a

Chapter 7, Problem AP2.18

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QUESTION:

Section I: Multiple Choice Choose the best answer for each question. Records from a random sample of dairy farms yielded the information below on the number of male and female calves born at various times of the day. Day Evening Night Total Males 129 15 117 261 Females 118 18 116 252 Total 247 33 233 513 What is the probability that a randomly selected calf was born in the night or was a female? (a) 369 513 (b) 485 513 (c) 116 513 (d) 116 252 (e) 116 233

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QUESTION:

Section I: Multiple Choice Choose the best answer for each question. Records from a random sample of dairy farms yielded the information below on the number of male and female calves born at various times of the day. Day Evening Night Total Males 129 15 117 261 Females 118 18 116 252 Total 247 33 233 513 What is the probability that a randomly selected calf was born in the night or was a female? (a) 369 513 (b) 485 513 (c) 116 513 (d) 116 252 (e) 116 233

ANSWER:

Step 1 of 3

General addition rule for any two events:

Complement rule:

Definition Conditional probability:

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