Activity 20 Normal Probability Distribution Concept.docx

Activity 20 Normal Probability Distribution Concept.docx -...

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A. Let Z be a standard normal variable. Find the following probabilities: 1. P ( Z < -1.96 ) =    2. P ( Z > 1.23 ) =    3. P ( Z > - 0.15 ) =    4. P ( -1.34 < Z < 0.00 ) =    B. Given a normal distribution with   = 82 and  2 = 25, find the probability that X  assumes a value 5. less than 78 =    6. more than 90 =    7. between 75 and 80 =    A. Let Z be a standard normal variable. Find the following probabilities: 1. P ( Z < 1.69 ) =    2. P ( Z > -1.32 ) =    3. P ( Z > 2.51 ) =    4. P ( -1.43 < Z < 0.15 ) =    B. Given a normal distribution with   = 83 and  2 = 16, find the probability that X  assumes a value 5. less than 80 =    6. more than 91 =    0.0250 0.1093 0.5596 0.4099 0.2119 0.0548 0.2638 0.9545 0.9066 0.0060 0.4832 0.2266 0.0228
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7. between 75 and 85 =    A. Let Z be a standard normal variable. Find the following probabilities:
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