Use the normal distribution to the right to answer the questions. (a) What percent of the scores are less than 19? (b) Out of 1500 randomly selected scores, about how many would be expected to be greater than 21? Standardized Test Composite Scores 1921Score mu equals 19.6 sigma equals 5.3 mu x A graph titled "Standardized Test Composite Scores" has a horizontal x-axis labeled "Score" from about 1 to 38 with tick marks at 19 and 21. A normal curve labeled μ = 21.2 σ = 5.4 is centered above the x-axis at 21.2. A vertical line segment labeled μ extends from the normal curve to the x-axis at 21.2. (a) The percent of scores that are less than 19 is nothing %. (Round to two decimal places as needed.) (b) About nothing scores would be expected to be greater than 21. (Round to the nearest whole number as needed.)