waster than in untreated water. Use the level of significance=0.05 Sample1=untreated water, Sample2=treated water (a) Find the test statistic. (b) Find the p-value. (c) State whether "reject H0" or "do not reject H0". Input as "reject" or "do not reject".
The concentration of benzene was measured in units of milligrams per liter for a simple random sample of five specimens of untreated wastewater produced at a gas field. The sample mean was 7.8 with a sample standard deviation of 1.4. Seven specimens of treated waste water had an average benzene concentration of 3.2 with a standard deviation of 1.7. Answer the following questions to test that the mean benzene concentration is less in treated waster than in untreated water. Use the level of significance=0.05
Sample1=untreated water, Sample2=treated water
(a) Find the test statistic.
(b) Find the p-value.
(c) State whether "reject H0" or "do not reject H0". Input as "reject" or "do not reject".
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