[Solved] Which of the following describes the structure of the coronavirus virion? A) Naked helical capsid B) Naked icosahedral capsid C) Icosahedral nucleocapsid surrounded by an envelope D) Helical nucleocapsid surrounded by an envelope E) None of the above. Variance: A measure of the spread or dispersion of a set of values, calculated as the average of the squared deviations from the mean. Random Variable: A variable that reflects numerical outcomes attributed to random occurrences. Occurrences: The instances or number of times an event or condition appears or is observed. Probability Distribution: A numerical function outlining all conceivable outcomes and their associated chances for a random variable within a certain range.