Where would the ecological validity of a research study be stronger?

In a multiple regression analysis, how many dependent variable(s) are in the analysis?

A researcher developed the following regression equation to predict muscular strength (y) from fat mass (Fat) in undergraduate students.                                                                             predicted y = 1.0 + 0.7 (Fat)                                                                                           R2 = .49                                                                                    In this sample, what is the proportion of the variance in undergraduate students’  muscular strength that is explained by fat mass (Fat)?

A researcher measured body mass (BM) for 100 undergraduates. The mean BM was 20 (SD=4). What would a person’s z-score be if the person had a body mass of 12?

A researcher was interested in examining the effects of the daily amount of creatine (5 grams, 10 grams, 15 grams, 20 grams) on the 50-yard sprint time of 200 female runners who volunteered for the study. From these 200 participants, 50 participants were randomly assigned to a daily dose of 5 grams of creatine; 50 participants were randomly assigned to a daily dose of 10 grams of creatine; 50 participants were randomly assigned to a daily dose of 15 grams of creatine; and 50 participants were randomly assigned to a daily dose of 20 grams of creatine. After being on the creatine dosage for 2 weeks, each participant’s 50-yard sprint time was measured. What is the independent variable?

If you were conducting a pairwise comparisons of 2 means and the 95% confidence interval for the difference in the 2 means was from -14 to -2, what would you conclude?

 A Type II error occurs when

When a human is becoming dehydrated, what happens in the kidney that helps reduce water loss and maintain osmotic balance (salt-water balance)?

A signal is relayed along a neuron by [a] and from one neuron to the next by [b].

In Kubler-Ross’ five stages of grief, _________ involves trying to think of ways to negotiate a longer life, such as promising to be a better person.