Researchers interested in lead exposure due to car exhaust sampled 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 50.24 ug/l and a standard deviation of 37.74 ug/t; a previous study from a nearby suburb, with no history of exposure, found an average blood level concentration of 35 ug/l. Is there evidence that the mean lead concentration for officers working traffic enforcement in a primarily urban environment is greater than 35 ug/? Use a =0.01. Note: The possible probabilities for the test are: 0.0027, 0.0054, 0.9973. Type out all steps, label your work, and include an interpretation (expressed as a complete sentence). All numbers should be rounded to 4 decimal places.

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Researchers interested in lead exposure due to car exhaust sampled 52 police officers subjected to constant
inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The
blood samples of these officers had an average lead concentration of 50.24 ug/l and a standard deviation of 37.74
ug/l; a previous study from a nearby suburb, with no history of exposure, found an average blood level
concentration of 35 ug/l.
Is there evidence that the mean lead concentration for officers working traffic enforcement in a primarily urban
environment is greater than 35 ug/? Use a = 0.01. Note: The possible probabilities for the test are: 0.0027,
0.0054, 0.9973.
Type out all steps, label your work, and include an interpretation (expressed as a complete sentence). All numbers
should be rounded to 4 decimal places.
B IUA - A - I E E3 I 1
x, E E
x²
E- 2 Vx + I T 12nt
Paragraph
AAN
!!! e
Transcribed Image Text:Researchers interested in lead exposure due to car exhaust sampled 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 50.24 ug/l and a standard deviation of 37.74 ug/l; a previous study from a nearby suburb, with no history of exposure, found an average blood level concentration of 35 ug/l. Is there evidence that the mean lead concentration for officers working traffic enforcement in a primarily urban environment is greater than 35 ug/? Use a = 0.01. Note: The possible probabilities for the test are: 0.0027, 0.0054, 0.9973. Type out all steps, label your work, and include an interpretation (expressed as a complete sentence). All numbers should be rounded to 4 decimal places. B IUA - A - I E E3 I 1 x, E E x² E- 2 Vx + I T 12nt Paragraph AAN !!! e
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