# Question

Kaminsky et al. (1992) present data on the number of orders per truck at a distribution center. Some of these data are sown in Table 7E.24.

(a) Set up a c chart for the number of orders per truck. Is the process in control?

(b) Set up a t chart for the number of orders per truck, assuming a geometric distribution with a = 1. Is the process in control?

(c) Discuss the findings from parts (a) and (b). Is the Poisson distribution a good model for these data? Is there evidence of this in the data?

(a) Set up a c chart for the number of orders per truck. Is the process in control?

(b) Set up a t chart for the number of orders per truck, assuming a geometric distribution with a = 1. Is the process in control?

(c) Discuss the findings from parts (a) and (b). Is the Poisson distribution a good model for these data? Is there evidence of this in the data?

## Answer to relevant Questions

A process is in statistical control with x =20 and s =1.2. Specifications are at LSL = 16 and USL = 24. (a) Estimate the process capability with an appropriate process capability ratio. (b) Items that are produced below the ...Consider the package weight data in Exercise 8.13. Suppose there is a lower specification at 0.985 kg. Calculate an appropriate process capability ratio for this material. What percentage of the packages produced by this ...The molecular weight of a particular polymer should fall between 2,100 and 2,350. Fifty samples of this material were analyzed with the results x = 2,275 and s = 60. Assume that molecular weight is normally distributed. (a) ...In a study to isolate both gauge repeatability and gauge reproducibility, two operators use the same gauge to measure ten parts three times each. The data are shown in Table 8E.10. (a) Estimate gauge repeatability and ...The surface tension of a chemical product, measured on a coded scale, is given by the relationship (3 + 0.05x)2 x where x is a component of the product with probability distribution Find the mean and variance of s.Post your question

0