Determine the appropriate statistical technique with which to answer the researcher's questions. Then, determine if the result is significant using a two-tailed test with ? = .05 (i.e.., report both r/rho/U/T/x²/t_critical and r/rho/U/T/x²/t_observed).

Help me with all four steps:

1) state the null and alternative hypotheses

2) identify the critical region

3) calculate the test statistic, a

4) make a formal decision about the null hypothesis and state your conclusion in the standard format for that test.

• A researcher would like to test the effect of a new diet drug on the activity level of animals. A sample of n = 7 rats is obtained and each rat's activity level is measured on an exercise wheel one hour prior to receiving the drug. Thirty minutes after receiving the drug, the rat is again tested on the activity wheel. The scores are indicated below. Do these data indicate that the drug had a significant effect on activity?