In the following probability distribution, the random variable x represents the number of activities a parent of a 6th- to 8th grade student is through (f) below pix) 0.244 0.218 0.77 0211 0.150 the mean is activities type an integer or a decimal. which of the following interpretations of the mean is correct? 0 a. the observed value of an expenment will be less than the mean of the random van abe in most experiments. o b. as the number of experiments increases, the mean of the observations will approach the mean of the random variable. ° c. the observed value of an experiment will be equal to the mean of the random variable in most experiments o d. as the number of experiments decreases, the mean of the observations will approach the mean of the random variable (d) compute the standard deviation of the random vanable x the standard deviation is activities round to one decimal place as needed) (e) what is the probability that a randomly selected student has a parent involved in three activities? the probability is type an integer or a decimal )