The absolute value is always positive: For example, the absolute value of -5: | - 5 | = 5 and also the absolute value of 5 : | 5 | = 5 P = - 1 1/4 The absolute value of point P. | P | = | - 1 1/4 | = 1 1/4
<span>3 is 1.0 below the mean. That is 1.0 / 0.9, or 1.1111... standard deviations below the mean. So look up z < -1.11 on your graphing calculator. It should be around 0.1335 or 13.35%</span>