So there is this one question, but I do not know what to use. (I believe it is 1 sample, can you plz tell me if I am right and wrong, and why?)
The company Pepsi does a test to see what people like better Pepsi or Coke. They were able to find that 10/19 people prefer Pepsi while 9/19 prefer Coke. Test the trup proportion of people liking Pespi is .5? I belive it is one sample with
q=.5 q is not equal .5
Please let me know if I am correct or not?
Thanks in advance!
I think you shold use the one-sample binomial test with $H_0:p=0.5$ and $H_1:p\neq 0.5$
The two-sample test is not applicable here because you only have one group of data, whereas the two-sample test is often used when you want to compare two groups of paired or unpaired data.