(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*

#### Top Answer

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