by cyang3 | May 22, 2016 | STAT 200
I record all the tricks here to determine a qualitative (categorical), quantitative, nominal, ordinal, discrete, and continuous variable. First, two main groups of variables are qualitative and quantitative. In order to distinguish them, the criterion is “Can...
by cyang3 | Nov 13, 2015 | STAT 200
I want to discuss a question popped up from my student when I was teaching how to find five-number summary. The case is simple, if we have only five number, (say 1, 2, 3, 4, and 5), what is the reason that calculators and the algorithm did not provide the five number...
by cyang3 | Oct 8, 2015 | STAT 200
I always tell students that the interpretation of 95% confidence interval, (a, b), should be as follows, Base on the same sampling procedure. I repeat the procedure 100 times, For each sample, a related confidence interval is calculated. (The interval may be different...
