Question: Consider the dissolved oxygen data in Exercise 8-94. Water quality engineers are interested in knowing whether these data support a claim that mean dissolved oxygen

Consider the dissolved oxygen data in Exercise 8-94.

Water quality engineers are interested in knowing whether these data support a claim that mean dissolved oxygen concentration is 2.5 milligrams per liter.

(a) Formulate an appropriate hypothesis testing procedure to investigate this claim.

(b) Test these hypotheses and draw conclusions, using 0.05.

(c) Find the P-value for this test.

(d) In Exercise 8-94

(b) you found a 95% CI on the mean dissolved oxygen concentration. Does this interval provide useful additional information beyond that of the hypothesis testing results? Explain your answer.

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