i need to choose an appropriate scale and interval size for a frequency table that will represent the data and then make a frequency table. How do i do this?
I have to tell you it is more than an art than exact science.
Read this: http://www.psychstat.missouristate.edu/introbook/sbk09m.htm
To choose an appropriate scale and interval size for a frequency table, follow these steps:
1. Identify the range of values in your dataset: Determine the minimum and maximum values present in your data. This will give you an idea of the overall range that needs to be represented in the frequency table.
2. Decide on the desired number of intervals: Consider the number of intervals you want to have in your frequency table. The number of intervals will depend on the size of your dataset and the level of detail you want to provide.
3. Calculate the interval size: Divide the range of values by the number of intervals you have decided upon. This will give you the interval size. Round up to the nearest convenient number.
4. Determine the scale: Decide on the scale you want to use for the frequency table. The scale should be appropriate for representing the values in a clear and concise manner. For example, if you have a large range of values, you might choose a scale that includes increments of 10 or 100 to simplify the table.
5. Create the frequency table: Once you have chosen the interval size and scale, create the frequency table by listing the intervals in ascending order and counting how many values fall within each interval.
Remember to label your frequency table with appropriate titles and headings, such as the variable being measured, the interval boundaries, and the frequency counts.
By following these steps, you can effectively choose an appropriate scale and interval size for your frequency table and create it accurately.