please solve all parts quality control

a. 14. The process spread is the same as the: tolerance b. quality spread c. index d. process capability 15. An s chart might be used as a measure of dispersion rather than an R chart because it is: easier to understand b. more sensitive to variations a. c. more accurate d. b and c a. 16. When taking the subgroup samples from product produced over a period of time rather than at an instant of time, which of the following occurs? maximum variation within a subgroup b. maximum variation from subgroup to subgroup c. easier to determine assignable causes d. all of the above 17. If data are plotted over time, the resulting chart will be a a. run chart b. histogram c. Pareto chart d. Poisson distribution 18. Attributes and variables data are best described as which of the following? Attributes Variables a. Counted values Measured values b. Counted values Visual features c. Measured values Counted values d. Visual features Counted values a. 19 For the normal curve approximately 68% of the data will fall between: +20 b. + lo +30 d. +40 c. 20. Which of the following subgroup sizes of an X and R chart would most likely be used for costly testing? a. 6 b. 4 c. 5 d. 2