For what range of monthly usage times is Alphacom cheapest? A 0 to 80 minutes

B
80 to 150 minutes
С
100 to 160 minutes

D
more than 150 minutes

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

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.