There are different sources for finding data files. Following are few sources:
1. Hospital Records.
2. School/College/University
3. Banks.
4. Online Campaign
If you are a student you can also perform primary data collection source via Questionnaire.
One reason I can think of why you might not be able to find the mean of numerical data would be if there were missing data points.
Searching
Number, string, binary string.
To collect data, a person must first know what they want to get data about. If someone wants data about horses, they would find a lot of horses and look at them for the data they would like to collect (such as color, size, or speed).
After you collect data, you need to analyze them. Perhaps you need to find the average of your data. Calculators are handy tools to help you do calculations quickly.
Apophenia is defined as being the ability to find patterns in data. These patterns can be seen in data that would otherwise be considered random or meaningless.
find the median of the set of data. and then find the quartiles. Q1 would be the 25th and Q3 would be the 75th
The software would tell it where to find the items.
you find the mad of the data by
If you can find published sn data, that would let you know.
You would find it in the fire and explosion hazard data section.
The best place to find data on the InFocus IN76 projector would be directly on the manufacturers website. Here you can find technical specifications as well as replacement parts and reviews.