No No No ; No All students answer (Yes or No) all parts of Problem 7. a. A sample of 15 data points is considered statistically significant: Yes ; No b. For processes approaching six sigma, are C charts recommended? Yes c. C charts are based on the Poisson distribution: Yes d. Control charts are always normal, even with a non-normal population distribution:Yes e. Cpk is always equal to or greater than Cp: Yes f. Cok > 0 indicates that the process mean is within the specification limits: Yes g. If there is no process average shift from Specification Nominal, then C-Cpk: Yes No h. For 2-sided specifications and no process average shift from Nominal, Cpk=Z/3: Yes i. The difference between P charts and nP charts is the use of Binomial Distribution: Yes No j. The difference between C and U charts is that the sample size is constant: Yes k. Moving range charts are used for samples > 50 observations: Yes : No ; No : No : No