T tuan New member Joined Apr 27, 2020 Messages 1 Apr 27, 2020 #1 Population stdev is unknown, I use sample stdev to calculate a confidence interval (my case is small sample size <30 skewed distribution). Then Suppose population stdev is known, how confidence interval and its accuracy is gonna change ( increase , decrease or remain )? Why
Population stdev is unknown, I use sample stdev to calculate a confidence interval (my case is small sample size <30 skewed distribution). Then Suppose population stdev is known, how confidence interval and its accuracy is gonna change ( increase , decrease or remain )? Why
A afos New member Joined Mar 3, 2020 Messages 25 Apr 27, 2020 #2 Hint: the former is based on t-distribution while the latter is based on standard normal distribution.
Hint: the former is based on t-distribution while the latter is based on standard normal distribution.
