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5. An environmental scientist wanted to test if the mean concentration of carbon trioxide in blue...

5. An environmental scientist wanted to test if the mean concentration of carbon trioxide in blue water exceeds the safe level of 22 blops per cubic centimeter of water. She collected 64 samples of blue water, and obtained a sample mean of 26.935 blops and a sample standard deviation of 14 blops. At significance level 0.05, can it be concluded that the true mean concentration exceeds 22 blops?

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