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A production line operates with a mean filling weight of 16 grams per container and is...

A production line operates with a mean filling weight of 16 grams per container and is known to have a standard deviation of 0.8 gram. A quality control inspector samples 30 items to determine whether or not the filling weight has to be adjusted. The sample mean was found to be 16.32 grams. The value of the test statistic is

Select one:

a. -1.645

b. 0.4

c. 12

d. 2.19

e. 1.645

math   Statistics-And-Probability   
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Answer #1

As population standard deviation is known, we will use z statistics

Hence answer here is

d. 2.19

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