Answer:
The confidence interval shows a range of values that includes this parameter of the population with an ascribed degree of confidence: (1) Mean; (2) Standard deviation; (3) Variance; (4) None of the above
Explanation:
In statistics, a pair or several pairs of numbers between which it is estimated that there will be a certain unknown value with a certain probability of success is called a confidence interval.
The standard deviation, is a measure used to quantify the variation or dispersion of a set of numerical data.
The answer is: (2) standard deviation.