A two-tailed test is chosen over a one-tailed test
a. in most studies.
b. when a researcher does not have a good idea of where the sample mean will fall.
c. when the researcher knows a sample mean will fall in one of the tails.
d. when a researcher has a clear idea of the tail in which the sample mean will fall.
Question 2
When neither the subjects nor the experimenter are aware of which group is
experimental and which is control, then the study is said to be
a. contaminated
b. confounded
c. concealed
d. double-blind
Digital rectal exam (DRE). The physician’s index finger is inserted into the rectum and pressed agai
Catalase Test
The Wug Test
Performing a Spirometry Test to Measure Forced Vital Capacity
Human salivary alpha amylase test.
The Ames test, which screens compounds for potential mutagenicity