jeanlovesmath
New member
- Joined
- Mar 4, 2015
- Messages
- 4
Hey guys,
So it has been a while since I've done any statistics but it's one of the compulsory papers for my course D: We looked at variables today and I got a bit confused with my lecturer's notes:
Under "Variables", he said that "Variables are usually denoted by capital Roman letters e.g. X, Y, Z" and "Measurements on these variables are usually denoted by lower case Roman letters, often indexed by a counter" - this makes sense but then...
Under "Sampling", he said that "A sample consists of n measurements from a population on variable X. The measurements can be denoted X1, X2, etc" and "The sample values are denoted x1, x2... xn and n is called the sample size"
What is the difference between the measurements that are denoted "X1, X2, etc" and the sample values that are denoted "x1, x2... xn"?
Thanks in advance guys
So it has been a while since I've done any statistics but it's one of the compulsory papers for my course D: We looked at variables today and I got a bit confused with my lecturer's notes:
Under "Variables", he said that "Variables are usually denoted by capital Roman letters e.g. X, Y, Z" and "Measurements on these variables are usually denoted by lower case Roman letters, often indexed by a counter" - this makes sense but then...
Under "Sampling", he said that "A sample consists of n measurements from a population on variable X. The measurements can be denoted X1, X2, etc" and "The sample values are denoted x1, x2... xn and n is called the sample size"
What is the difference between the measurements that are denoted "X1, X2, etc" and the sample values that are denoted "x1, x2... xn"?
Thanks in advance guys