B. A statistic is a random variable, which will be denoted by an uppercase letter. A. Before the observations in a sample becomes available, we view each observation as a random variable. 37. Which of the following statements are true? A. Before the observations in a sample becomes available, we view each observation as a random variable. B. A statistic is a random variable, which will be denoted by an uppercase letter. C. A lower case letter is used to represent the calculated or observed value of the statistic. Which of the following statements are correct? A. The sample mean, regarded as a statistic (before a sample has been selected or an experiment carried out), is denoted by X while the calculated value of this statistic is x . B. S 2 represents the sample standard deviation and is regarded as a statistic, while the calculated value of this statistic is s 2 . C. A statistic is any quantity whose value can be calculated from population data.