If the mean score on a math test taken by a group of 11th grade students was 60 and the median score was 80 which of the following is correct:

The best measure of central tendency

When the distribution is symmetric and unimodal, which of the following are always equal?

The ____________ scale of measurement has equal intervals between the points on the scale but lacks a true zero point.

Suppose a nurse took four successive measurements of your diastolic blood pressure (in mm) and got the values 78, 81, 80 and 92. The median of the four measurements is: 

When we make implicit assumptions about a scale having interval properties,

What does NOT count as "measurement?"

The most important characteristics behind using different scales is

In the study examining the relationship between voting preference and income, the voting preference is: 

A group of students received the following scores in a quiz:  40, 39, 37, 36, 36, 31, 31, 31, and 29. What is the mode of this distribution?