Assume researchers are trying to find out the mean concentration levels of a specific drug in a population of individuals’ blood during a clinical trail. The researchers find that the sample population of 30 has a mean concentration of 6.7 mcg/mL with a standard deviation of 1.3 mcg/mL. Calculate a 95% confidence interval for the mean concentration level of the medication for the population’s blood and interpret it.A) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.152 mcg/mL and 9.248 mcg/mL.B) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 6.235 mcg/mL and 7.165 mcg/mL.C) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.568 mcg/mL and 8.832 mcg/mL.D) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.5615 mcg/mL and 8.8385 mcg/mL.

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Asked Feb 3, 2020
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Assume researchers are trying to find out the mean concentration levels of a specific drug in a population of individuals’ blood during a clinical trail. The researchers find that the sample population of 30 has a mean concentration of 6.7 mcg/mL with a standard deviation of 1.3 mcg/mL. Calculate a 95% confidence interval for the mean concentration level of the medication for the population’s blood and interpret it.

A) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.152 mcg/mL and 9.248 mcg/mL.

B) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 6.235 mcg/mL and 7.165 mcg/mL.

C) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.568 mcg/mL and 8.832 mcg/mL.

D) The researchers are 95.0% confident the true mean concentration of medication in the population’s blood is between 4.5615 mcg/mL and 8.8385 mcg/mL.

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Expert Answer

Step 1

From the provided information,

The sample mean () = 6.7 mcg/mL

Standard deviation (σ) = 1.3 mcg/mL

Sample population (n) = 30

The confidence interval can be ob...

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