Q. 2.148 - Elementary Statistics

Question

Sickle Cell Disease. A study published by E. Anionwu et al. in the British Medical Journal (Vol, 282, pp .283-286) measured the steady-state hemoglobin levels of patients with three different types of sickle cell disease. Following is a stem-and-leaf diagram of the data.

Step-by-Step Solution

Answer

The distribution is roughly symmetric.

Step 1: Given Information

To determine whether the given graph is symmetric or right-skewed or left-skewed.

Step 2: Explanation

A stem and leaf plot is a classification tool for discrete and continuous variables. To organise data as it is acquired, a stem and leaf plot is employed. A stem and leaf plot resembles a bar graph in appearance. The name comes from the fact that each number in the data is divided into a stem and a leaf.

Let's consider the given graph:

The tallest peak in the graph is nearly in the middle of the stem and leaf plot. Therefore, the distribution is roughly symmetric.