99.7%
95.4%
68.3%
\mu - 3\sigma
\mu - \sigma
\mu - 2\sigma
\mu
\mu + \sigma
\mu + 3\sigma
\mu + 2\sigma
?
Sketch a normal curve for a random variable x that has a mean of \mu = 120 and a standard deviation of \sigma = 10. Label the horizontal axis with values of 90, 100, 110, 120, 130, 140, and 150.
90 100 110 120 130 140 150
150 140 130 120 110 100 90
90 110 130 150 140 120 100
100 120 140 150 130 110 90