Week 2 Exam-1 - AtExamChapter8andSections9.1and9.2

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At Exam Chapter 8 and Sections 9.1 and 9.2 MTH 157 - Math for Elementary Teacher II Name_ __________________________________ Week 2   SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question.  Provide an appropriate response.  1) 
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The  mayor of  one city  has been  conductin g an anti - smoking  campaign  in high  schools.  Each year  local  governme nt  researcher s estimate  the  number of  teenagers  in the city  who  smoke.  The  number of  smokers  has  declined  steadily in  each of  the past  five years.  The  mayor's  office  constructs  a bar  graph  showing  the  number of  teenage  smokers  in each of  the past  five years.  If the  mayor  wished to  exaggerat e the  success of  his anti - smoking campaign, would it be to his advantage to truncate the bar graph? Explain your  thinking. 
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1)  
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Yes  truncating will cause the discrepancy to look a lot bigger so his point will be more obvious   Use the given data to construct a stem - and - leaf plot.  2) 
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Twenty - four  workers  were  asked how  long it  takes  them to  travel to  work each  day. The  times (in  minutes)  are given  below. 20  35  42  52  65  20  60  49  24  37  23  24 22  20  41  25  28  27  50  47  58  30  32  48 
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2)     Identify the misuse or misrepresentation of statistics.  3) 
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"38% of  adults in  the United  States  regularly  visit a  doctor".  This  conclusio n was  reached  by a  college  student  after she  had  questione d 520  randomly  selected  members  of her  college.  What is  wrong  with her  survey? 
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3)   Her  specific college is not a random sample. Her sample is biased. 
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This note was uploaded on 10/24/2010 for the course MAT 157 MAT 157 taught by Professor Kitchens during the Spring '10 term at University of Phoenix.

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Week 2 Exam-1 - AtExamChapter8andSections9.1and9.2

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