25. Calculate the mean number of products sold using these numbers.

81,0,41,0,32, 97.

26. Calculate the variance number of errors using this population data

35, 4, 27, 44, 42, 10

27. Calculate the skew products sold per store using this sample data

81, 0, 41, 0, 32, 97

28. Calculate the median for products sold per store using this data.

81, 0, 41, 0, 32, 97