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35.    The type of research sampling that takes a sample from every nth subject, which can be determined by dividing the total population size by the desired sample size is termed:a.    Randomb.    Conveniencec.    Judgmentald.    Systematic 

29.     During a clinical trial, the examiners will assign group A with the placebo and group B with a new toothpaste. The participants are unaware of which treatment they receive. This is an example of a:a.    Single-blind trialb.    Double-blind trialc.    Triple-blind triald.    Quadruple-blind trial

COMMUNITY TESTLET: Use the following testlet to answer questions 41-45.  RESEARCH QUESTION: Which pre-procedural mouth rinse is more effective in reducing bleeding during NSPT, Chlorhexidine (CHX), hydrogen peroxide, or the placebo, salt water (saline solution). HYPOTHESES: A) There is no difference between CHX and hydrogen peroxide. B) There is a difference between CHX and hydrogen peroxide, patients rinsing with CHX will have the least amount of bleeding.  METHODOLOGY: In a double-blind study, SCC students between the ages of 18-21 were the subjects (ages = 19, 18, 19, 21,20, 19, 20, 19, 20, 20, 19). Each participant was randomly assigned to the CHX, hydrogen peroxide, or placebo group. The study was conducted over 4 weeks, 1 quad evaluated per week using the O’Leary Bleeding Index. Each participant rinsed with 5mL of their assigned mouth rinse 15 min prior to treatment.  RESULTS: A parametric test was used to determine if there was a statistically significant difference between the rinses. The results showed an overall statistically significant reduction in bleeding using CHX (p < 0.03). Additionally, an r-value of - 0.87 demonstrates a measure of correlation between bleeding and use of CHX. 45.    Looking at the correlation test between the use of CHX and amount of bacteria, the r-value is -0.87. This relationship shows what type of relationship between variables?a.    Positive and weak correlationb.    Negative and weak correlationc.    Positive and strong correlationd.    Negative and strong correlation

21.    In a normal distribution, where the curve is symmetrical or bell shaped, what is the relationship between the measures of central tendency: mean, median, mode?a.    Mean = Median = Modeb.    Mean > Median > Modec.    Mean < Median < Moded.    Mean > Median = Mode

11.    One way to help with the issue of accessibility to care is the RDHAP, which stands for:a.    RDH in Alternative Practiceb.    RDH in Advanced Placementc.    RDH – Advanced Practitionerd.    RDH – Anchovy Pizza

30.    A RDH can be an advocate when it comes to the development of community oral health programs. Ultimately, the policies that determine the implementation of such programs come from:a.    The Executive Branchb.    The Judicial Branchc.    The Legislative Branch

18.    According to Maslow’s Hierarchy of Needs, intimate relationships and friendships fall under which category?a.    Basic needsb.    Psychological needsc.    Self-fulfillment needs

A 7-month-old infant has had two prior acute ear infections and is currently on the 10th day of therapy with amoxicillin-clavulanate after a failed course of amoxicillin. The pediatric APRN notes marked middle ear effusion and erythema of the tympanic membrane. The child is irritable and has a temperature of 99.8 degrees F. What is the next step in the management of this child’s ear infection?

6.    On a global level, the most prevalent oral condition is:a.    Dental cariesb.    Xerostomiac.    COPDd.    Periodontal diseasee.    Oral manifestations associated with autoimmune disease

Upper respiratory infections are transmitted via: