Dr. Mathers thinks that copper deficiency may cause a loss in bone density. He k

Question

Dr. Mathers thinks that copper deficiency may cause a loss in bone density. He knows that copper deficiency causes a loss of pigmentation in hair in bicolored black & white rats after four weeks (see pictures below). Previously you helped design his experiment. Now you need to collect data including weight, coat color (white or bicolored), and bone density results. Bone Mineral Density (BMD) results are collected in g/cm2.

Q1: Briefly describe the type(s) of data that you will be collecting, making sure to clearly include/indicate:

Describe which type(s) of data are qualitative or quantitative

Describe the form(s) of data you will collect (discrete vs continuous and which are which)

Describe the scale(s) of data that you will use (nominal, ordinal, interval, ratio)

Explanation / Answer

Qualitative data are not in numerical form and requires an exact description of the subjects involved. In this case, coat color(white or bicolored) is a qualitative datum. Quantitaive data involves numerical details and is measurable. Weight and bone density are the quantitaive data.

The forms of data collected would be discrete as it takes both numeric values as with weight and bone density as well as categorical as with the coat color.

Ratio as it will cover all the aspects of nominal for labeling variables, ordinal comprising order of values, and interval which tells the differences of the values.

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