Based on a random sample from a population, a researcher estimated that the mean value of a certain variable for the population is
It is plausible that the actual mean value of the variable for the population is between
It is not possible that the mean value of the variable for the population is less than
Every value of the variable in the population is between
The mean value of the variable for the population is
Choice A is correct. It's given that based on a random sample from a population, the estimated mean value for a certain variable for the population is
Choice B is incorrect. The estimated mean value and associated margin of error describe only plausible values, not all the possible values, for the actual mean value of the variable, so this is not an appropriate conclusion.
Choice C is incorrect. The estimated mean value and associated margin of error describe only plausible values for the actual mean value of the variable, not all the possible values of the variable, so this is not an appropriate conclusion.
Choice D is incorrect. Since