Discuss the below:
Organizing and Visual Data
Q1: Soft drinks are sold in three sizes at a fast-food restaurant- small, medium, and large. Explain why the size of the soft drinks is an example of an oridnal scaled variable.
Q2: Each day at a large hospita, several hundred laboratory tests are performed. The rate at which these tests are done improperly ( and therefore need to be redone) seems steady, at about 4%. In an effort to get to the root cause of these nonconformances, tests that need to be redone, the director of the lab decided to keep records over a period of one week. The laboratory tests were subdivided by the shift of works who performed the lab tests. The results are as follows:
SHIFT
Lab Tests Performed Day Evening Total
Nonconforming 16 24 40
conforming 654 306 960
Total 670 330 1,000
a. Construct contingency tables based on total percentages, row percentages, and column percentages.
b. Which type of percentage - row, column, or total - do you think is most informative for these data? Explain .
c. What conclusions concerning the pattern of nonconforming laboratory tests can the laboratory director reach?