The null hypothesis is represented by the symbol H0.
Indicate whether the statement is true or false
Question 2
Reflect on the Are You Equipped Now at the end of the chapter. The article indicated that about 11 of the participants had already received acupuncture in the year before the treatment.
This fact is associated with which of the following threats to internal validity?
a. selection
b. maturation
c. regression to the mean
d. attrition