STA 301 - HW03 Key

# STA 301 HW03 Key - STA 301 Applied Statistics Spring 2008 Section B Homework#3 Key Due Monday February 11 Question 1(p 39#2.10 An engineering firm

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STA 301 – Applied Statistics Spring 2008, Section B Homework #3 - Key Due Monday, February 11 Question 1 (p. 39, #2.10) An engineering firm is hired to determine if certain waterways in Virginia are safe for fishing. Samples are taken from three rivers. (a) List the elements of the sample space, S , using the letters F for “safe to fish” and N for “not safe to fish.” S = { FFF, FFN, FNF, NFF, FNN, NFN, NNF, NNN } (b) List the elements of S corresponding to event E that at least two of the rivers are safe for fishing. E = { FFF, FFN, FNF, NFF } (c) Define (in words) an event that has as its elements the points { FFF, NFF, FFN, NFN }. “The second river is safe for fishing.” Question 2 (p. 39, #2.16) If { } , 12 0 | < < = x x S { } , 9 1 | < < = x x M and { } , 5 0 | < < = x x N find (a) N M U (b) N M I (c) ' ' N M I ) 9 , 0 ( ) 5 , 0 ( ) 9 , 1 ( = = U U N M ) 5 , 1 ( ) 5 , 0 ( ) 9 , 1 ( = = I I N M ( 29 ) 12 , 9 [ = = N M N M U I

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STA 301-B, Spring 2008 Homework 3 Key Page 2 of 4 Question 3 : (p. 47, #2.28) A drug for the relief of asthma can be purchased from 5 different manufacturers in liquid,
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## This homework help was uploaded on 04/17/2008 for the course STA 301 taught by Professor Noe during the Spring '08 term at Miami University.

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STA 301 HW03 Key - STA 301 Applied Statistics Spring 2008 Section B Homework#3 Key Due Monday February 11 Question 1(p 39#2.10 An engineering firm

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