7. (20 pts) The amount of lead in paint was determined by measuring 10 samples. The mean value was found to be 200 ppt w
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7. (20 pts) The amount of lead in paint was determined by measuring 10 samples. The mean value was found to be 200 ppt w
7. (20 pts) The amount of lead in paint was determined by measuring 10 samples. The mean value was found to be 200 ppt with a % relative standard deviation of 10%. The paint can label indicates that the amount of lead in the paint is 190 ppt. At the 95% confidence level, is the measured value greater than the label reports? Show all of your work.
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