Given a data set, how do you know whether to calculate sigma or s? Choose the correct answer below. A. If the given data set contains a large number of entries, then s is calculated. If the data set contains a small number of entries, then sigma is calculated. B. When given a data set, one would have to determine if it represented the population or if it was a sample taken from the population. If the data are a population, then sigma is calculated. If the data are a sample, then s is calculated. C. When given a data set, one would have to determine if it represented the population or if it was a sample taken from the population. If the data are a population, then s is calculated. If the data are a sample, then sigma is calculated. D. If the given data set contains a large number of entries, then sigma is calculated. If the data set contains a small number of entries, then s is calculated.