Realgrades

classical definition of probability - correct answer P({E}) = (# of outcomes in the event)/(# of outcomes in the sample space) = n(E)/n(S) probability of complement - correct answer P(E) = 1 - P(E^-1) P(A ∪ B) if A and B are mutually exclusive - correct answer P(A ∪ B) = P(A) + P(B) in general P(A ∪ B) if A and B are NOT mutually exclusive - ...

Census - correct answer A type of survey where everyone in population is measured EX: A survey where for ALL college students. Sample - correct answer People from a population you measure EX: creating a survey with college students of RI. Sampling Frame - correct answer Sampling units within the population - specific group of individuals EX: ...

Mill's Method of Difference - correct answer if everything's the same except for one thing, then we can really isolate a cause; one variation; precursor to the modern experiment; looking for difference between groups vs within groups (classical) experimental design - correct answer use of control vs experimental groups 4 basic steps to an experiment - correct answer ...

Which one of the following statements is TRUE? - correct answer As the alpha-level increases, the probability of a Type II error of a hypothesis test decreases. A pharmaceutical company has developed a new medication to lower a person's cholesterol. The advertisement for the new drug cites the results of an experiment comparing the drug with a placebo stating that the cholesterol level had been lowered by an average of 13.2 mg/l with a P-value &...

types of qualitative data - correct answer ordinal, nominal, dichotomous types of sampling - correct answer simple random, systematic, stratified, cluster systematic sampling - correct answer samples selected according to fixed interval stratified sampling - correct answer individuals randomly selected...

Defining Experimental Methodology - correct answer Evaluate the influence of some input variable on some output variable while controlling for all other extraneous variables Requirements of Causality - correct answer Whether changes in the IV(s) cause subsequent changes in the DV(s) ex: Facebook Use ----> Grades Manipulation of the Independent Variable - correct answer ...

The independent-samples test is designed to measure _____________ between two samples that are independent of each other or two subsets within the same sample - correct answer Mean differences A ______________ t-test for two samples means is appropriate when we can assume that the population standard deviations are equal - correct answer Pooled variance Even if the means in the population are equa...

nominal - correct answer Naming or labeling (example: color of your eyes) Ordinal - correct answer being of a specified position or order in a numbered series interval/ratio - correct answer Ordering and exact distances Stages of Social Research - correct answer 1) Develop hypothesis 2)Develop instrum...

Retrospective Study - correct answer A retrospective study gathers historical data through records. The outcomes have already occurred before the study Observational Study - correct answer A type of study in which individuals are observed or certain outcomes are measured. No attempt is made to affect the outcome. Designed Experiment - correct answer I...

Hypothesis Statements are made about: - correct answer Population parameters Type I Error - correct answer Rejecting null hypothesis when it is true Probability of Type I Error - correct answer alpha Type II Error - correct answer failing to reject a false null hypothesis Probability of Type II Erro...