52) A new machine that fills tubes of toothpaste will be monitored using statistical process control. The following data were collected while the machine was closely monitored and under control. Each day a random sample of six tubes are weighed. Based on the data, the process mean is 6.752. Monday 6.91 6.84 6.71 6.76 6.70 6.79 Tuesday 6.83 5.74 6.75 5.82 6.78 5.71 Wednesday 6.80 6.72 6.72 6.79 6.72 6.71 Thursday 6.74 6.79 6.70 6.71 6.80 6.72 Friday 6.65 6.68 6.79 6.71 6.75 6.72 What is the lower control limit for the x-bar chart rounded to three decimal places? A) 6.816 B) 6.676 C) 6.688 D) 6.828 53) A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. Sample 2 3 4 5 Defectives 3 2 What is the average percent defective? A) 2.0% B) 2.3% C) 2.6% D) 2.9% 54) A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. Sample 2 3 4 5 Defectives 3 3 4 2 What is the UCL? A) 6.7% B) 7.4% C) 8.1% D) 100%