Chemical Forums
Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: dolphinsea14 on November 22, 2018, 04:24:20 PM
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Hair found at the scene of a crime is analyzed and compared with hair belonging to a suspect. Using atomic absorption analysis, a technique known to have a true (or population) standard deviation of 12.00 ppm zinc, the following results were obtained.
Hair at crime:196, 204 ppm Zn
Hair from suspect:193, 188, 195, 199 ppm Zn
Using the method of comparison of means can you deduce that the suspect is guilty of the crime?
I think I should use t-test for this task.
But I am not sure where to use the standard deviation of the technique in my calculations. Can you help me?