What are the steps to collect and analyze thumbprint and height data from a class?

The image contains two study questions that require practical data collection from a class. As an AI, I cannot perform these physical activities or collect real-world data. Therefore, I cannot provide specific numerical answers for these questions.

Here's how you would approach them:

Study Question 1: What percentage of each type of thumbprint is found amongst the members of your class?
To answer this, you would need to:

1. Identify the different types of thumbprints (e.g., arch, loop, whorl).
2. Collect thumbprints from each member of your class.
3. Classify each thumbprint into its respective type.
4. Count the number of students for each thumbprint type.
5. Calculate the percentage for each type using the formula: $$\text{Percentage} = \frac{\text{Number of students with that thumbprint type}}{\text{Total number of students in the class}} \times 100\%$$

Without this data, a specific percentage cannot be provided.

Study Question 2: Height
This question outlines a procedure to collect and analyze height data from your class. As an AI, I cannot perform the steps of marking a scale, measuring heights, or collecting data from your classmates.

However, I can describe the process you would follow:

1. Mark a scale: Draw a vertical scale on a wall from 120 cm to 200 cm.
2. Measure heights: Each student measures their height to the nearest centimeter.
3. Collect data: Record the heights of all class members.
4. Group the data: Create class intervals of 4 cm. For example:
   • 120 cm - 123 cm
   • 124 cm - 127 cm
   • 128 cm - 131 cm
   • ...and so on, up to 196 cm - 199 cm.
5. Prepare a frequency table: Count how many students fall into each height interval. The table would look like this:

   Height Interval (cm)	Tally	Frequency
   120 - 123
   124 - 127
   ...
   196 - 199

6. Plot a graph: Create a histogram where the x-axis represents the height intervals (classes) and the y-axis represents the frequency (number of students).

Since I don't have the class data, I cannot complete the frequency table or plot the graph.