Use the graph of the given normal distribution to identify μ and σ.

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Presentation transcript:

Use the graph of the given normal distribution to identify μ and σ. 62 86 68 74 80 92 98 X Section 7.1

Find the probability of the standard normal random variable Z. P(Z < 1.49) 0.9319 0.0681 0.6879 0.3121 Section 7.2

Find the probability of the standard normal random variable Z. P(Z ≥ –2.31) 0.0104 0.0087 0.9896 0.9913 Section 7.2

Find the probability of the standard normal random variable Z. P(–2.14 < Z < 0.95) 0.1170 0.0681 0.1873 0.8127 Section 7.2

Find the Z-score such that the area under the standard normal curve to the right is 0.10. 1.28 -1.28 0.5398 0.8159 Section 7.2

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability a randomly selected person has an IQ score greater than 120. 0.9082 0.6293 0.0918 0.3707 Section 7.2

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Determine the 90th percentile for IQ scores. 1.28 81 119 114 Section 7.2