Any of these wrong?

Question 20 1/1 In order to calculate the variance, which of the following must you know? O median O mode O range @standard deviation Question 21 1/1 When reporting descriptive data such as the mean, what additional information should also be reported that expresses how different the scores are in the distribution? percentile skew variability O outlier Question 22 1/1 As your sample size grows larger, your standard deviation will be: the accuracy will not change a more accurate estimate of the population O a less accurate estimate of the population this cannot be determined