our environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 5.5 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 9 samples is 5.1 ppm with a standard deviation of 0.8. assume the population is normally distributed. a level of significance of 0.05 will be used. find the value of the test statistic. round your answer to three decimal places.

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02-11-2022
Mathematics

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our environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 5.5 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 9 samples is 5.1 ppm with a standard deviation of 0.8. assume the population is normally distributed. a level of significance of 0.05 will be used. find the value of the test statistic. round your answer to three decimal places.

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