A Manufacturer of a Chemical Used in Glue, Attempting to Control

question 60

Multiple Choice

A manufacturer of a chemical used in glue, attempting to control the amount of a hazardous chemical its workers are exposed to, has given instructions to halt production if the mean amount in the air exceeds 3.0ppm. A random sample of 50 air specimens produced the following statistics: sample mean = 3.1 ppm, sample standard deviation = 0.5 ppm. Assume measurements are normally distributed.
-The appropriate test statistic to test the hypotheses is _____.

• A)1.00
• B)-1.00
• C)2.80
• D)1.41
• E)-1.41

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