1. Manufacturing Variation Plotting a Normal Distribution

2. Variation is inherent Plotting variation gives a Normal distribution or Gaussian distribution or Bell Curve

3. Normal distribution Most values are clustered around the Mean Some values are deviated: spread out. Measure of this deviation is a number called Standard Deviation . 68 % of data are within  1  95 % of data points are within  2  99.7 % of data points are within  3 

4. Histogram in Excel Prepare the “bin” range: divide data into buckets. Add-in the Data analysis and select Histogram Select the input data, bin data and output column Format plot according to writing guidelines. Find average and Standard Deviation of data. Submit a Memo for the above.