Explanation for Question 13 From the Math (Calc) Section on the 2019 March Sat
Question 13 asks what is the range in years of the mean ages 2 of the patient survey who had contact lens fittings in the country show? 3 So this is asking us to take all of the mean ages which are 4 in this column right here in the table, 5 find the lowest value and the highest value, 6 and then subtract them. So first we're going to find the highest, 7 the largest value, which is 36.3. 8 And then we're going to find the lowest one, which is 26.6. 9 Now we're just going to subtract. So 36.3 minus 10 26.6 is equal to 9.7. 11 And so that is our answer. And the correct answer here is C.