The Average Magnesium Concentration in Ground Water Around Metro City

question 12

Essay

The average magnesium concentration in ground water around Metro City is parts per million (ppm) with a standard deviation of . The table below shows the ground-water magnesium concentrations (ppm) from random sites in a suburb located 15 miles away. At , can it be concluded that the average magnesium concentration in the suburb differs from 86.2 ppm? a. State the hypotheses and identify the claim.
b. Find the critical values.
c. Compute the test statistic.
d. Make a decision.
e. Summarize the results.

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