Sampling, confidence intervals, regression aur hypothesis testing visually samjho!
Sample size aur confidence level change karo. CI width kaise badal-ghate dekho aur sampling distribution samjho!
Data points paste karo (x,y pairs, ek per line). Regression line aur correlation coefficient automatic fit hoga!
Claim (ΞΌβ), sample stats enter karo. z-statistic aur critical region visually dikhega. Reject ya accept?
Population non-normal hoti hai, but n badhane par sample means ki distribution Normal ban jaati hai β CLT magic!