Please help me solve these questions, thank you!

With a sample greater than 30, when are estimates of variables normally distributed? (multiple answers possible) C] When variables are normally distributed. C] When the distribution of the variable is uniform. C] When the distribution of the variable is skewed to the left. C] When the distribution of the variable is skewed to the right. What is the standard error when the standard deviation of the sample is 20 and the sample size is 25? 020 0400 O4 05 The standard error of the mean depends on... (multiple answers possible) C] sample size C] standard deviation of the mean C] the mean C] the variance of the mean A smaller standard error means... (multiple answers possible) O a more precise estimate O a less precise estimate O a larger confidence interval O a smaller confidence intervalAs a statistician before a study you can decide at which p-value you want to set the level of significance. Essentially, at which probability do you want to set the threshold to reject the null-hypothesis. In social science there are common standards, where to set these thresholds. What are common p-levels in social science? (multiple answers possible) 5% (p