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imagine that your town or city has increased its nighttime police patrols to reduce crimedesign two quasi-experiments
1 why do researchers use inferential statistics2 distinguish between the null hypothesis and the experimental
1 explain the difference between rejecting and failing to reject the null hypothesis in which case does a researcher
1 if the calculated value of t is less than the critical value do you reject or fail to reject the null hypothesis
1 why must a different t-test be used for matched-subjects and within-subjects designs than for randomized groups
if the results of a t-test lead you to reject the null hypothesis what is the probability that you have made a type ii
a using the table of critical values of t in appendix a-2 find the critical value of t for an experiment in which there
if the difference between two means is not statistically significant how certain are you that the independent variable
generally researchers are more concerned about making a type i error than a type ii error can you think of any
a researcher was interested in the effects of weather on cognitive performance he tested participants on either sunny
1 whats so bad about making a type i error2 how does the bonferroni adjustment control for type i error when many
for each experiment described below identify any confounds that may be present be careful not to identify things as
1 the independent variable was whether the applicant appeared to have a disability2 the dependent variables were
1 how many conditions are there in the simplest possible experiment2 describe how participants are assigned to
1 what is a factorial design why are factorial designs used more frequently than one-way designs2 how many independent
1 describe a 2 x 2 x 3 factorial design how many independent variables are involved and how many levels are there of
1 describe a mixed or split-plot factorial design this design is a hybrid of what two other designs2 what is a main
1 what is an interaction2 how many interactions can be tested in a 2 x 2 design in a 3 x 3 design in a 2 x 2 x 3
1 how do mixed expericorr designs differ from other experimental designs2 distinguish between an independent variable
explain how you would conduct the study you designed in question as a matched-subjects designquestion-design a
what main effects and interaction could you test with the design you developed for question 1 are you predicting that
you have been asked to evaluate the effects of a new educational video that was developed to reduce racial prejudice
calculated the correlation between outside temperature and class attendance the regression equation for the data in
one of the behavioral research case studies involved agocha and coopers 1999 study of partner characteristics and
data show that narcissistic people who have a grandiose inflated perception of themselves often fly into a narcissistic