1. Studies on a machine that molds plastic water pipe indicate that when it is injecting 25.13 mm diameter pipe, the process standard deviation is 0.49 mm. The pipe has a specification of 25.13 mm plus or minus 1.21 mm. What is the process capability index (Cp)?

Select one:

a.1.646

b.0.4116

c.2.469

d.0.8231

2. Determine which delivery alternative would be most economical for 50 boxes of parts. Each box costs $365 and the annual holding cost is 27% of the cost. Assume 365 days per year. Overnight delivery option costs $300, and eight-day delivery option costs $125

Select one:

a.The eight-day option is at least $80 cheaper than overnight

b.The overnight option is at least $80 cheaper than eight-day

c.The overnight option is at least $160 cheaper than eight-day

d.The eight-day option is at least $160 cheaper than overnight

3. A single server queuing system with a Poisson arrival rate and exponential service time has an average arrival rate of 10 customers per hour and an average service rate of 14 customers per hour. What is the probability that a customer waits 6 minutes or more in the line?

Select one:

a.0.7143

b.0.4788

c.2.697e-011

d.0.2857

4. The specification limits for a product are 9.02 cm and 10.9 cm. A process that produces the product has a mean of 9.79 cm and a standard deviation of 0.8 cm. What is the process capability, Cpk?

Select one:

a.0.3917

b.0.4625

c.0.3208

d.0.7833