The measure of central tendency to determine the effectiveness can be the mean, median or mode
It is true that you can calculate the mean as a measure of central tendency for reading the email
The survey result is given as:
To determine if the email is effective or not, we simply carry out a test of significance.
However, if the central of tendency is to be used to determine the effectiveness; it is best to use the mean.
Hence, it is true that you can calculate the mean as a measure of central tendency for reading the email
Read more about measure of central tendency at:
https://brainly.com/question/17631693