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hw3-67 - STA 3024 Section 7459 Homework 3 Form C UFID Name...

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STA 3024 Homework 3 Section 7459 Form C Name: UFID: This form is only for students whose UFID number begins with 6 or 7. Answer all problems neatly . If you turn in more than one piece of paper, they must be stapled . Work that isn’t neat or stapled may lose points. You don’t need to turn in this problem listing, but you do need to include your name , UF-ID number , and form code on your homework. 1. In 1976, there was some question about the effectiveness of the noise-silencing in air pollution filters for cars produced by Associated Octel Company. These data are from a report filed in response to this question with the Air and Water Pollution Subcommittee of the Senate Public Works Committee (data available from the Data And Story Library). In the table below the means are given followed by the standard deviation (in parentheses). Is there any evidence that the noise produced (measured in dB) depends on the size of the car used? There were 12 cars in each group.
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