A study is conducted to test whether a new drug is effective.  Which of the following is an example of a Type 2 error?      Stating the drug does not work when it really does not work.     Stating the drug works, when it really does not work.     Stating the drug does work when it really does work.     Stating the drug does not work, when it really does work.

When people learn a new task, their performance usually improves when they are tested the next day, but only if they get 6 hours sleep (Sticckgold, et al., 2000). The following data demonstrate this phenomenon.  The participants learned a visual discrimination task on one day.  Half of the participants were allowed to have at least 6 hours of sleep and the other half were kept awake all night.                                         6 hours sleep                                   No sleep                                            n =14                                                  n = 14                                           M = 72                                                M =65                                           SS = 932                                            SS = 706 Will the 6-hour sleep show a much higher performance rate? This time use a one-tail with alpha = .05    Show all of the steps. Remember use the attached t-distribution chart when  obtaining your…

When people learn a new task, their performance usually improves when they are tested the next day, but only if they get 6 hours sleep (Sticckgold, et al., 2000). The following data demonstrate this phenomenon.  The participants learned a visual discrimination task on one day.  Half of the participants were allowed to have at least 6 hours of sleep and the other half were kept awake all night.                                         6 hours sleep                                   No sleep                                            n =14                                                  n = 14                                           M = 72                                                M =65                                           SS = 932                                            SS = 706 Is there a significant difference between the two conditions? Use a two-tailed test with α = .01. Remember to use the attached t-distribution chart when obtaining your critical region. Please…

200 students took a test twice; 135 students passed the test on both. 35 students failed the test twice. However, 14 students passed the test the first time, but failed the second time. 16 students failed the first time, but passed the second time. What is the reliability coefficient? a. .90 b. .85 c. .79 d. .75