QUESTION 39 FROM CHAPTER 7.docx

QUESTION 39 FROM CHAPTER 7.docx - Part A is clear The...

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Part A is clear: The distribution will be normal. Part B: Formula 7-1 Page 231 in the book 1 . 1 25 5 . 5 x Part C: Formula 7-2 Page 233 in the book – This is because the standard deviation is know i.e. 5.5 36 35 0.91 5.5 25 z So probability is 0.1814, found by 0.5000 - 0.3186. Part D: Formula 7-2 Page 233 in the book – This is because the standard deviation is know i.e. 5.5
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