The following data represent the scores for a sample of 10 students on a 20-point chemistry quiz:
16 14 2 8 12 12 9 10 15 13
a. Calculate the median.
______________
b. Calculate the sample mean.
______________
c. Calculate the sample variance.
______________

Sample Variance

A measure of the variability or spread of a sample data set, calculated as the average of the squared differences from the sample mean.

Sample Mean

The mean of a collection of numbers, determined by adding all the values together and then dividing the total by the count of values in the set.

Median

The middle value in a dataset when arranged in ascending or descending order, effectively dividing the dataset into two equal halves.