O$$Neill sells the same $3$mm boot for surfing every year. Because this is a functional product with little fashionable content, O$$Neill believes that this is a stable product, i$.$e$.,$ expected demand doesn$$t change from year to year. However, sales are concentrated in a short period during the summer. O$$Neill plans to use sales data from the last five years to forecast demand this year. Those data are $850,1025,1000,990$ and $875.$ Note, due to the short selling season, in two of the seasons O$$Neill ran out of boots, whereas in three of those seasons O$$Neill had boots left over at the end of the season and they were held over until the next season. What is the mean of the demand forecast?

Question $3$ options:

The mean of O'Neill's demand forecast should equal $948$

The mean of O'Neill's demand forecast should be greater than $948.$

The mean of O'Neill's demand forecast should be less than $948.$

It is not possible to determine whether O'Neill's forecast should be $948,$ greater than $948$ or less than $948.$