The weights (in pounds) of 30 newborn babies are listed below. Find $Q _ { 1 }$.
$\begin{array} { l l l l l l l l l l } 5.5 & 5.7 & 5.8 & 6.0 & 6.1 & 6.1 & 6.3 & 6.4 & 6.5 & 6.6 \end{array}$
$\begin{array} { l l l l l l l l l l } 6.7 & 6.7 & 6.7 & 6.9 & 7.0 & 7.0 & 7.0 & 7.1 & 7.2 & 7.2 \end{array}$
$\begin{array} { l l l l l l l l l l } 7.4 & 7.5 & 7.7 & 7.7 & 7.8 & 8.0 & 8.1 & 8.1 & 8.3 & 8.7 \end{array}$
A) 7.5 lb
B) 6.4 lb
C) 5.8 lb
D) 6.3 lb

Question

Quizplus · Accepted Answer

To find $Q_1$, the first quartile, we need to find the median of the first half of the data. The data set has 30 values, so the first half consists of the first 15 values. The median of these 15 values is the 8th value, which is 6.4 lb.

The Weights (In Pounds) of 30 Newborn Babies Are Listed Q1Q _ { 1 }Q1​

The Weights (In Pounds) of 30 Newborn Babies Are Listed $Q _ { 1 }$