should the researcher use a one- or two-tailed statistical test?

Samuel works for the local YMCA. He believes that retired adults who participate in group exercises at the YMCA have lower blood pressure than those who participate in exercise on their own. He thinks that not only does the exercise help them physically, butsocializing with others helps lower their stress. If this is so, he would like to institute more group classes for retirees.

Research question:

Null hypothesis:

Alternate hypothesis:

Based on the following alternate hypotheses, should the researcher use a one- or two-tailed statistical test?

What are the multiple correlations of three sets of predictors and overall state of health?

What are the multiple correlations of three sets of predictors and overall state of health? The first set of predictors contains demographic variables (age and years of education). The second….

What conclusions might you draw from these data?

According to the Death Penalty Information Center, death penalty states record higher murder rates than non-deathpenalty states. On January 1, 2014, the average murder rate among death penalty states was….

How would you defend these reforms to persons who advocate for tough-on-crime approaches?

The 10-member Colson Task Force on Federal Corrections is composed of Republican and Democrat federal and state congressional leaders, a federal judge, a U.S. attorney, a state warden, a professor,….