3. If the differences of recorded and reported scores of SAT could be tested for all possible participants in question 2, what would the following be? a. The variance b. The standard deviation 4. Round answers to two decimal places. X 30 29 28 N - WO A COCK 27 26 25 24 The score at the 25th percentile for the above distribution is 28.13. The score at the 75th percentile for the above distribution is 29.97. Determine the semi-interquartile range for the above data. 5. Calculate the variance using the definitional formula. (Hint. Set up a table) X = 6 Scores: 3 4 5 6 78 9