Given that 220 = -2 and 25o = -1, which of the following do you know?
0
The
The variance is 10.
The standard deviation is 30,
The mean is 80
The median is 40.
The data point x = 20 is 2 standard deviations from the mean.
The data point x = 50 is 1 standard deviation from the mean,
The data point x = 45 has a z-value of 1,5