Which statement is true of an appropriate sample of a population?

a. a sample must be a group of people who are the target of the survey question.
b. a sample should have different characteristics than the population.
c. a sample must be very small.
d. a sample should include only boys or only girls.

Which of these was not a key difference between northern and southern states at the constitutional convention? wanting to protect states’ interests vs. a government with strict rules having more, larger cities vs. having fewer, smaller cities wanting to protect agriculture vs. protect industries having many enslaved people vs. using less enslaved labor

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality.potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english

About how many crusaders took part in the crusaders