Results of a survey revealed that the monthly utility bills…

Results of a survey revealed that the monthly utility bills of a 3-bedroom house in Beckville had a mean of $115 and a standard deviation of $11. The distribution was considered bell-shaped. Based on this information, answer the following. Approximately what percent of the 3-bedroom homes had a monthly utility bill over $126?     [16]% Approximately 95% of the 3-bedroom homes had a monthly utility bill between $[93] and $[137]

A project team successfully increased the yield of a manufac…

A project team successfully increased the yield of a manufacturing process, from 71% to 87%.  As part of the control phase, the team should implement a statistical process control chart to monitor the process for large changes in the percentage of nonconforming product. As the team’s SPC expert, which control chart would you recommend?