### Statistics - Probability for Normal Distribution & Critical Z-Value for hypothesis testing

1.The net profit of an investment is normally distributed with a mean of $10,000 and a standard deviation of $5,000. The probability that the investor's net profit will be between $12,000 and $15,000 is _____________. a) 0.8413 b) 0.1859 c) 0.4967 d) 0.3413 2. When the rod shearing process at Stockton Steel is