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Suppose Z ~ N(0, 1). Use the standard Normal table or your calculator to find P(z  -2.30).

Suppose Z ~ N(0, 1). Use the standard Normal table or your calculator to find P(z  -2.30). 0.0107 0.0099 0.9893 0.9901 0.9898. 10. Suppose Z ~ N(0, 1). Use the standard normal table or your calculator to determine P(-2.25 < z < 1.77). 0.9494 0.9415 0.9477 0.9616 0.9432. 10.

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Suppose Z ~ N(0, 1). Use the standard Normal table or your calculator to find P(z  -2.30).

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  1. Suppose Z ~ N(0, 1). Use the standard Normal table or your calculator to find P(z  -2.30). • 0.0107 • 0.0099 • 0.9893 • 0.9901 • 0.9898 10

  2. Suppose Z ~ N(0, 1). Use the standard normal table or your calculator to determine P(-2.25 < z < 1.77). • 0.9494 • 0.9415 • 0.9477 • 0.9616 • 0.9432 10

  3. What is the 50th percentile of the standard normal distribution? • z = 0.50 • z = 0.0 • z = -0.5 • z = 1.0 • z = -1.0 10

  4. What is the 67th percentile of the standard normal distribution? • z = 0.67 • z = 1.67 • z = 0.44 • z = -0.44 • z = -0.67 10

  5. The SAT scores of incoming NCSU freshmen can be approximated by a normal model with mean 1775 and standard deviation 135 (2400 point scale). What proportion of incoming freshmen score between 1559 and 2072? • 0.0409 • 0.9313 • 0.6 • 0.9320 • .513 10

  6. The SAT scores of incoming NCSU freshmen can be approximated by a normal model with mean 1775 and standard deviation 135 (2400 point scale). The scholarship office will offer scholarships to students who score in the top 2.28%. What is the lowest score a student can achieve and be eligible for a scholarship? • 1505 • 2045 • 1908.47 • 1641.53 10

  7. A box of Extreme Choco Loops cereal is marked “Net Wt. 12 oz.” If the actual weight can be approximated by a normal model with mean 12 oz. and standard deviation 0.2 oz, what is the probability that a box weighs less than 12 oz? • 0.68 • 0.12 • 0.50 • 0.34 • 0.84 10

  8. A box of Extreme Choco Loops cereal is marked “Net Wt. 12 oz.” If the actual weight can be approximated by a normal model with mean 12 oz. and standard deviation 0.2 oz, what weight will be exceeded by 2.5% of the boxes? • 12.392 oz. • 11.608 • 9.50 oz. • 12.199 oz. • 11.80 oz. 10

  9. The cholesterol levels of adult American women can be approximated by a normal model with mean 188 mg/dL and a standard deviation of 24. Approximately what cholesterol value is the cutoff for the first quartile of adult American women cholesterol levels? • 164.15 • 171.8 • 204.19 • 182 • 194 10

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