A theme park want to know which new ride option is the most appealing to customers. Which sampling method produces an unbiased representative sample. A). Survey 100 randomly selected parents in a theme park.

B). Survey 30 customers to enter the theme park

C). Survey the first 80 teenagers to enter the theme park

D). Survey the first 250 customers in the line

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.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.