The Annals of the American Academy of Political and Social Science, Volume 587A.L. Hummel, 2003 - 207 páginas |
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Página 32
... null hypothesis , is ordinarily that the program or treatment has no effect . The task of the researcher is to see whether the empiri- cal findings gained in a study provide enough reliable evidence to reject this null hypothesis . When ...
... null hypothesis , is ordinarily that the program or treatment has no effect . The task of the researcher is to see whether the empiri- cal findings gained in a study provide enough reliable evidence to reject this null hypothesis . When ...
Página 38
... null hypothesis is accepted averages 38 % " ( p . 195 ) .12 Using a similar threshold , in which a statistically nonsignificant result was incorrectly reported at least once in a study , the result for criminal justice evaluations would ...
... null hypothesis is accepted averages 38 % " ( p . 195 ) .12 Using a similar threshold , in which a statistically nonsignificant result was incorrectly reported at least once in a study , the result for criminal justice evaluations would ...
Página 44
... null hypothesis test employed , replacing a null hypothesis of no difference with that of a difference of .20 in favor of treatment . We use a one - tailed test of statistical significance because we are concerned only with whether ...
... null hypothesis test employed , replacing a null hypothesis of no difference with that of a difference of .20 in favor of treatment . We use a one - tailed test of statistical significance because we are concerned only with whether ...
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Palavras e frases frequentes
analysis Annals Anthony Petrosino antisocial behavior assess Before-after benefit-cost ratio Campbell Collaboration car parks CCTV closed-circuit television comparison control area control group cost-benefit cost-benefit analysis costs and benefits Crime and Justice crime prevention criminal justice Criminology criteria curfew enforcement curfew laws curfew violators David delinquency displacement edited effect of CCTV effect size effect sizes evaluation research evaluation studies evidence evidence-based experimental Farrington follow-up Gottfredson identify impact included internal validity intervention issue Justice Economics juvenile crime juvenile curfews juvenile offenders Lipsey Lösel Maryland Report ment meta-analysis methodological quality moderator variables months null hypothesis odds ratio outcome measures Pawson and Tilley percent postintervention practice Preventing crime prevention programs problems quality scale random assignment randomized experiments research design sample scale scientific score sentencing options Sherman standards statistical conclusion validity statistical power statistically nonsignificant findings statistically significant systematic reviews tion versus Weisburd Welsh