Question

option #1: first period
option #2: second period
which data distribution is the most symmetrical and suggests using the mean as the most appropriate measure of center?
number of books
first period
number of books
second period

Explanation:

Step1: Understand data distribution symmetry

A symmetric data distribution has an even spread around the center. The first - period data (Option #1) is symmetric as the dots are evenly distributed. The mean is appropriate for symmetric data.

Step2: Analyze the second - period data

The second - period data (Option #2) is skewed. For skewed data, the median is a better measure of center. But the question asks for which data distribution is the most symmetrical (so we focus on the first - period data for the mean as the measure of center).

Answer:

Option #1: First Period