Slide 4- 1 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Active Learning Lecture Slides For use with Classroom Response Systems Elementary Statistics: Picturing the World Fourth Edition by Larson and Farber Chapter 5: Normal Probability Distributions

Slide 5- 2 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(z < 1.49) A B C D

Slide 5- 3 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(z < 1.49) A B C D

Slide 5- 4 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(z ≥ –2.31) A B C D

Slide 5- 5 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(z ≥ –2.31) A B C D

Slide 5- 6 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(–2.14 < z < 0.95) A B C D

Slide 5- 7 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the probability using the standard normal distribution. P(–2.14 < z < 0.95) A B C D

Slide 5- 8 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 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. A B C D

Slide 5- 9 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 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. A B C D

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 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 between 100 and 120. A B C D

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley 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 between 100 and 120. A B C D

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the z-score that has 2.68% of the distribution’s area to its right. A. z = B. z = –1.93 C. z = – D. z = 1.93

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Find the z-score that has 2.68% of the distribution’s area to its right. A. z = B. z = –1.93 C. z = – D. z = 1.93

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What IQ score represents the 98 th percentile? A. 131 B. 69 C. 113 D. 145

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What IQ score represents the 98 th percentile? A. 131 B. 69 C. 113 D. 145

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley A population has a mean of 80 and a standard deviation of 12. Samples of size 36 are selected from the population. Describe the sampling distribution of. A. Normal, B. Normal, C. Approximately normal, D. Approximately normal,

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley A population has a mean of 80 and a standard deviation of 12. Samples of size 36 are selected from the population. Describe the sampling distribution of. A. Normal, B. Normal, C. Approximately normal, D. Approximately normal,

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley American children watch an average of 25 hours of television per week with a standard deviation of 8 hours. A random sample of 40 children is selected. What is the probability the mean number of hours of television they watch per week is less than 22? A B C D

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley American children watch an average of 25 hours of television per week with a standard deviation of 8 hours. A random sample of 40 children is selected. What is the probability the mean number of hours of television they watch per week is less than 22? A B C D

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Use a correction for continuity to convert the following interval to a normal distribution interval. The probability of getting at least 80 successes A. x > 80.5 B. x > 79.5 C. x < 80.5 D. x < 79.5

Slide Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Use a correction for continuity to convert the following interval to a normal distribution interval. The probability of getting at least 80 successes A. x > 80.5 B. x > 79.5 C. x < 80.5 D. x < 79.5