What type of hypothesis is the following: VO2 Max is not related to Running speed.

A researcher developed an intervention designed to increase the grip strength of adults 85 years or older.  The researcher randomly selected 16 older adults and used available body mass index (BMI) data, to create 8 matched pairs on BMI. Within each pair, the researcher randomly assigned 1 participant to the intervention and 1 to the control group. The strength training program was implemented for 10 weeks (1 training session/week).  Immediately following the intervention, all adults were tested for grip strength.  Higher scores represent greater grip strength. What effect will increasing the number of matched pairs (instead of 8 pairs having 80 pairs) have on statistical power?

Using the correlation matrix below, what is the correlation between CMJump and Squad bin?

A researcher was interested in evaluating an intervention that would impact body mass. The researcher was also interested in evaluating if there were sex differences in body mass. The researcher recruited 10 males and 10 females for the study. For the 10 males, 5 males were randomly assigned to the intervention and 5 males were randomly assigned to a control condition. Similarly, for the 10 females, 5 females were randomly assigned to the intervention and 5 females were randomly assigned to a control condition. Based on the information provided, what statistical technique produced the table above?

Power can range from -1 to +1.

A researcher was interested in comparing 3 group conditions: Meditation, Progressive Muscle Relaxation PMR), and a Control condition on heart rate. 28 freshmen undergraduates from USF were randomly selected.  From these 28 students, 13 were randomized to the Control Condition, 8 were randomly assigned to Meditation, and 7 were randomly assigned to Progressive Muscle Relaxation. Using a .05 level of significance is there a statistically significant difference between PMR and Meditation?

If a researcher was planning a randomized controlled trial to evaluate the effect of an exercise intervention (intervention group vs. control group) on blood pressure, in which situation would you need a larger sample size to achieve the same level of power.  Assume all other factors are kept the same.

A researcher was interested in evaluating if there was a relationship between participants’ academic class rank in high school (e.g., 1st, 2nd, 3rd, etc.) and their class rank in College (e.g., 1st, 2nd, 3rd, etc.).  What statistic would you use?

A researcher examined the body mass index (BMI) of 1000 randomly selected undergraduates from USF and found a mean of 25. If the median BMI was 18, what would you conclude about the shape of the distribution of BMI scores?

When researchers discuss statistical interaction, what type of variable are researchers focusing on?