संपूर्ण जनसंख्या में सभी परीक्षण प्राप्तांकों के लिए परिकलित मानक विचलन को क्या कहा जाता है?

Match the statistical technique (Column I) with its primary use (Column II): Column I (Statistical Technique): A. ANOVA B. Chi-square Test C. Pearson's r D. t-test Column II (Primary Use): 1. Tests association between two categorical variables 2. Compares means of more than two groups 3. Measures degree of linear relationship between two variables 4. Compares means of two groups

Statement 1: In a normal distribution, the mean, median and mode are equal and the curve is perfectly symmetrical. Statement 2: Positive skewness indicates that the tail of the distribution extends towards the lower values (left side). Which of the statement(s) is/are correct?