A study reports the mean change in HDL highdensity lipoproti

A study reports the mean change in HDL (high-density lipoprotien, or \"good\" cholesterol) of adults eating raw garlic six days a week for six months. This margin of error for a 95% confidence interval is given as plus or minus 6 milligrams per deciliter of blood (mg/dl). This means

A. the study used a method that gives a result within 6 mg/dl of the truth about the population in 95% of all samples

. B. we can be certain that the study result is within 6 mg/dl of the truth about the population.

C. we can be certain that the study result is within 6mg/dl of the truth about the population if the conditions for inference were satisfied.

D. the study used a method that gives a result within 6 mg/dl of the truth about the population in only 5% of all samples.

Solution

A. the study used a method that gives a result within 6 mg/dl of the truth about the population in 95% of all samples

that is the answer because 95 % of confidence interval means that you are very sure that 95% of the samples is in that interval