Explain what the symbols d and Sa represent. What does the symbol d represent? A. The mean of the differences between each data entry and the mean of the data entries O B. The difference of the means of the paired data entries in the dependent samples O C. The mean of the differences between the paired data entries in the dependent samples O D. The difference between a pair of data entries in the dependent samples What does the symbol S represent? A. The standard deviation of the differences between the paired data entries in the dependent samples O B. The standard deviation of the data entries in the combined sample O C. The standard deviation of the difference between the means of the paired data entries in the dependent samples O D. The standard deviation of the differences between each data entry and the mean of the data entries