The mean is activities. Type an integer or a decimal. Do not round.) Which of the following interpretations of the mean is correct? A. The observed value of an experiment will be less than the mean of the random variable in most experime B. As the number of experiments decreases, the mean of the observations will approach the mean of the ra C. As the number of experiments increases, the mean of the observations will approach the mean of the ra D. The observed value of an experiment will be equal to the mean of the random variable in most experime Compute the standard deviation of the random variable x. e standard deviation is activities. ound to one decimal place as needed.) What is the probability that a randomly selected student has a parent involved in three activities? probability is be an integer or a decimal. Do not round.) What is the probability that a randomly selected student has a parent involved in three or four activities? probability is e an integer or a decimal. Do not round.)