Suppose you are researching the eating habits of people your age. What sampling method could you use to find the percentage of students in your grade who eat five servings of fruit and vegetables each day? What is an example of a survey question that does not have bias?

PLEASE ANSWER “what sampling method could you use“ and “What is an example of a survey question that does not have bias?”

Which of the following expressions are equivalent ?

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?