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(1) Provide the goal of the study and clearly state the research hypothesis by describing the variables. (2) Describe the results noting the...

(1) Provide the goal of the study and clearly state the research hypothesis by describing the variables.

(2) Describe the results noting the direction (e.g., higher or lower; increase or decrease; etc.) and difference between sample mean (M = ?; 95% CI = ?) and the population mean (µ = ?).

 (3) Report and interpret the 95% CI around the difference between the two means (e.g., does the CI contain 0 or not—how do you interpret the Ho if it does or does not include 0?). Also, be sure to report and interpret the effect size (d = ?).

 (4) Report the inferential statistic used to compute the p-value (Z [ n = ?] = observed value, p < or > α) and state if the results are significant or not.


1.  A research team happens to know that male rats administered a placebo drug will spend μ = 5 minutes per hour grooming (σ = 6). They believe that male rats administered a low dose of the street drug ecstasy will spend less than 5 minutes per hour grooming. They chose 100 male rats, administered a low dose of ecstasy to each, and measured the number of minutes per hour each rat spent grooming. The mean of this sample was M = 4. The research question the researcher want to answer is: does administering a low dose of ecstasy affect the time spent grooming

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Hypothesis : A test of statistical hypothesis is two action decision problem after the experimental sample values have been... View the full answer

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