Unlike confidence intervals, hypothesis tests require that some predetermined population value be used to evaluate sample values. Can you think of any other differences between hypothesis tests and confidence intervals?
Answer to relevant Questions(True or False) You should consider using a confidence interval whenever (a) The null hypothesis has been rejected (b) The issue is whether or not an effect is present (c) The issue involves possible effect sizes (d) There ...Assume that on average, healthy young adults dream 90 minutes each night, as inferred from a number of measures, including rapid eye movement (REM) sleep. An investigator wishes to determine whether drinking coffee just ...Although the samples are actually related, an investigator ignores this fact in the statistical analysis and uses a t test for two independent samples. How will this mistake affect the probability of a type II error? Given the aggression scores below for Outcome A of the sleep deprivation experiment, verify that, as suggested earlier, these mean differences shouldn’t be taken seriously by testing the null hypothesis at the .05 level of ...In a classic study, Milgram et al. “ lost” stamped envelopes with fictitious addresses (Medical Research Association, Personal Address, Friends of Communist Party, and Friends of Nazi Party).* One hundred letters with ...
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