Question

The following scores on the midterm exam in Chemistry 102 were recorded. Find the 2nd quartile, Q2.

a) 81
b) 80
c) 80.5
d) 77

Answer 1

The second quartile (Q2) for the Chemistry 102 midterm exam scores is 80.25, which is the average of the two middle scores in the ordered dataset.

Step-by-step explanation:

The second quartile, Q2, also known as the median of a data set, divides the data into two equal halves. To find Q2 for the Chemistry 102 midterm exam scores, we first need to list the scores in ascending order:

1. 77
2. 80
3. 80.5
4. 81

Since there is an even number of scores (4 scores), the second quartile (Q2) is the average of the middle two scores. Therefore, Q2 is the average of 80 and 80.5.

Q2 = (80 + 80.5) / 2 = 80.25

The second quartile for these midterm exam scores in Chemistry 102 is 80.25.