The following appear on a physician's intake form.

(a) The level of measurement for ''Disabilities'' is $\mathbf{\text{Nominal}}$. Nominal data refers to categories or labels that do not have any inherent order or numerical value. In this case, disabilities can be categorized into different types or conditions, but there is no inherent order or numerical significance assigned to them.
(b) The level of measurement for ''Change in health (scale of -5 to 5)'' is $\mathbf{\text{Interval}}$. Interval data represents values where the differences between measurements are meaningful and consistent. In this case, the scale of -5 to 5 indicates that the intervals between each level of change in health are equal, and the zero point is arbitrary. However, there is no true zero that represents the absence of change in health.
(c) The level of measurement for ''Year of birth'' is $\mathbf{\text{Ratio}}$. Ratio data possesses all the properties of interval data, but it also has a true zero point that indicates the absence of the measured quantity. In this case, the year of birth has a true zero point at 0 AD, and the differences between years are meaningful and consistent.
(d) The level of measurement for ''Height'' is $\mathbf{\text{Ratio}}$. Similar to the year of birth, height also exhibits the characteristics of ratio data. It has a true zero point (i.e., a height of 0 cm represents no height) and consistent and meaningful differences between measurements.

The level of measurement for each data type can be determined as follows:
(a) The level of measurement for ''Disabilities'' is $\mathbf{\text{Nominal}}$. $Nominal$
(b) The level of measurement for ''Change in health (scale of -5 to 5)'' is $\mathbf{\text{Interval}}$. $Interval$
(c) The level of measurement for ''Year of birth'' is $\mathbf{\text{Interval}}$. $Interval$
(d) The level of measurement for ''Height'' is $\mathbf{\text{Ratio}}$. $Ratio$