random.yx {statpsych} | R Documentation |
Generates a random sample of y scores and x scores from a bivariate normal distributions with specified population means, standard deviations, and correlation. This function is useful for generating hypothetical data for classroom demonstrations.
random.yx(n, my, mx, sdy, sdx, cor, dec)
n |
sample size |
my |
population mean of y scores |
mx |
population mean of x scores |
sdy |
population standard deviation of y scores |
sdx |
population standard deviation of x scores |
cor |
population correlation between x and y |
dec |
number of decimal points |
Returns n pairs of y and x scores
random.yx(10, 50, 20, 4, 2, .5, 1) # Should return: # y x # 1 50.3 21.6 # 2 52.0 21.6 # 3 53.0 22.7 # 4 46.9 21.3 # 5 56.3 23.8 # 6 50.4 20.3 # 7 44.6 19.9 # 8 49.9 18.3 # 9 49.4 18.5 # 10 42.3 20.2