Average weekly demand = 68,429

Based on the weekly demand information for the last 26 weeks included in the graph,

QUESTION- ESTIMATE the level at which you must set the production (same level for all 26 weeks) to ensure that you have a 90% probability that of demand is covered by the production.

The answer must include-

1) a table of Z-values,

2) standard deviation / variance formula, and other related statistical variables .

Make sure you include the calculations and reference tables where you got the information from.

I have included reference lines to better estimate the values of each weekly demand.

Fressie Orange 1 liter