In the examples listed below, identify the following: is there an independent va
ID: 3275922 • Letter: I
Question
In the examples listed below, identify the following: is there an independent variable? Is this independent variable continuous or discrete? What is the dependent variable? Is this dependent variable continuous or discrete?
a. Samples were taken from a specific batch of chemical and randomly divided into two groups. One group was assayed by the manufacturer’s own quality control laboratory. The second group was sent to a contract laboratory for analysis.
Assay of chemical samples from the same production batch
Contract lab
b. An instrument manufacturer ran a series of tests to compare the pass or fail rate of a new piece of tablet disintegration equipment. Samples were taken from a single batch of uncoated tablets. Two different temperatures were used and tested for compendia recommended times. Success was defined as all six tablets disintegrating in the disintegration equipment.
c. Two different scales were used to measure patient anxiety levels upon admission to a hospital. Method A was an established test instrument, while Method B (which had been developed by the researchers) was quicker and an easier instrument to administer. Was there a correlation between the two measures?
Assay of chemical samples from the same production batch
ManufacturerContract lab
101.1 98.8 97.5 99.1 100.6 99.0 101.1 98.7 100.8 98.7 97.8 99.5 Failure 4 12 16 Success 96 39°C 35°C 100 100 200 184Explanation / Answer
The correlation between method A and method B is 0.919. There is a strong correlation between method A and method B.