CPM Homework Help : CC2MN Problem 9-53

Ms. Poppy has finished grading her students’ tests. The scores were $62$ , $65$ , $93$ , $51$ , $55$ , $76$ , $79$ , $85$ , $55$ , $72$ , $78$ , $83$ , $91$ , and $82$ .

Find the median.
Hint (a):
Recall that the median is the middle number of an ordered set of data.

Find the quartiles.
Hint (b):
Along with the median, the quartiles divide a set of data into four groups of the same size.
Answer (b):
$\text{Lower Quartile (Q1)}=62$
$\text{Upper Quartile (Q2)}=83$

Find the IQR.
Hint (c):
$\text{IQR}=\text{Q3}-\text{Q1}$

Find the mean.
Hint (d):
Recall that the mean refers to the average of a set of data.