The effect of adding fluoride to a community's water supply was tested by comparing annual records of cavities per patient in local dentists’ offices for six years before and four years after the fluoride was added. This is an example of which type of research?
a. Interrupted time series
b. Regression discontinuity
c. Propensity score matching
d. Cross-sectional comparison
a. Interrupted time series
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Which of the following best describes an information affidavit?
A. It is a certification by a public prosecutor that there is evidence to justify bringing named individuals to trial. B. It is a formal written statement from a grand jury charging an individual with an offense. C. It is an arrangement whereby attorneys are provided for people accused of crimes who are unable to hire their own attorneys. D. It is an arrangement whereby public officials are hired to provide legal assistance to people accused of crimes who are unable to hire their own attorneys. E. It is a term used to describe work that lawyers do for which they receive no fees.
Which form of protest involves breaking "unjust" laws?
A. peaceful protest B. organized protest C. petitioning D. civil disobedience
Which of the following is NOT true regarding the food stamps program?
a. The program imposes nationally uniform standards so there is little variation among the states. b. Eligibility for the program is largely determined by income levels. c. Legal immigrants may not participate in the program. d. Beneficiaries are issued electronic debit cards, which they may use to purchase food from participatingretailers.
The response rate to a survey or other data collection effort is a result of ______, or how successful the researchers are at contacting people or units, and __________, or how willing the contacted people or units are to participate.
Fill in the blank(s) with the appropriate word(s).