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2. A study of pollutants showed that certain industrial emissions should not exceed 2.5 parts per million. You believe a particular company may be exceeding this average. To test his supposition, you randomly take a sample of nine air tests. The sample average is 3.4 parts per million, with a sample standard deviation of 0.6. Does this result provide enough evidence for you to conclude that the company is exceeding the safe limit? Use level of significance of .01. Assume emissions are normally distributed. a. State the null hypothesis in symbolic form. Ho: b. State the alternative hypothesis in symbolic form. Ha: c. The critical value = d. The value of the test statistic = e. What are the decision and conclusion of the test in the context of the problem?

          2. A study of pollutants showed that certain industrial emissions should not exceed 2.5 parts per million. You believe a particular company may be exceeding this average. To test his supposition, you randomly take a sample of nine air tests. The sample average is 3.4 parts per million, with a sample standard deviation of 0.6. Does this result provide enough evidence for you to conclude that the company is exceeding the safe limit? Use level of significance of .01. Assume emissions are normally distributed.
a. State the null hypothesis in symbolic form. Ho: 
b. State the alternative hypothesis in symbolic form. Ha: 
c. The critical value =
d. The value of the test statistic =
e. What are the decision and conclusion of the test in the context of the problem?

2. A study of pollutants showed that certain industrial emissions should not exceed 2.5 parts per million. You believe a particular company may be exceeding this average. To test his supposition, you randomly take a sample of nine air tests. The sample average is 3.4 parts per million, with a sample standard deviation of 0.6. Does this result provide enough evidence for you to conclude that the company is exceeding the safe limit? Use level of significance of .01. Assume emissions are normally distributed.
a. State the null hypothesis in symbolic form. Ho:
b. State the alternative hypothesis in symbolic form. Ha:
c. The critical value =
d. The value of the test statistic =
e. What are the decision and conclusion of the test in the context of the problem?

Added by Domingo T.

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