The data collected on various blood groups of a population of a city is:

The data collected on various blood groups of a population of a city is Qualitative data.

Explanation:

1. Qualitative data is defined as the data that approximates and characterizes.
2. Qualitative data can be observed and recorded.
3. This data type is non-numerical in nature.
4. This type of data is collected through methods of observations, one-to-one interviews, conducting focus groups, and similar methods.
5. Qualitative data in statistics is also known as categorical data – data that can be arranged categorically based on the attributes and properties of a thing or a phenomenon.

Therefore, collecting data on various blood groups of a population requires qualitative analysis.

1. Quantitative data: Quantitative data is the type of data whose value is measured in the form of numbers or counts, with a unique numerical value associated with each data set. Also known as numerical data, quantitative data further describes numeric variables (e.g. How many?

2. Continuous data: Data that can take any value (within a range). Example: People's heights could be any value (within the range of human heights), not just certain fixed heights.

3. Descriptive data: Descriptive statistics are used to describe the basic features of the data in a study. They provide simple summaries about the sample and the measures.