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3. Research suggests that the average level of anxiety has increased gradually over the past 60+ years. In the 1950s, the average score on the Child Manifest Anxiety Scale was µ = 15.1, with o = = 4. Assuming that the distribution of anxiety scores is approximately normal, what proportion of children have a score of X = 17 or more? Answer the following questions: a. On the drawing of the normal distribution, show the mean, standard deviation, and the location of X = 17. Shade in the area that corresponds to the proportion of children with a score of 17 or more. (2 points) b. Convert X= 17 to z. (2 points) c. Using the z table, find P(X> 17)= (2 points)

3. Research suggests that the average level of anxiety has increased gradually over the past 60+ years. In the 1950s, the average score on the Child Manifest Anxiety Scale was µ = 15.1, with o = = 4. Assuming that the distribution of anxiety scores is approximately normal, what proportion of children have a score of X = 17 or more? Answer the following questions: a. On the drawing of the normal distribution, show the mean, standard deviation, and the location of X = 17. Shade in the area that corresponds to the proportion of children with a score of 17 or more. (2 points) b. Convert X= 17 to z. (2 points) c. Using the z table, find P(X> 17)= (2 points)

Ciccarelli: Psychology_5 (5th Edition)
Ciccarelli: Psychology_5 (5th Edition)
5th Edition
ISBN:9780134477961
Author:Saundra K. Ciccarelli, J. Noland White
Publisher:Saundra K. Ciccarelli, J. Noland White
Chapter1: The Science Of Psychology
Section: Chapter Questions
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3. Research suggests that the average level of anxiety has increased gradually over the past 60+ years. In the 1950s, the average score on the Child Manifest Anxiety Scale was µ = 15.1, with o = = 4. Assuming that the distribution of anxiety scores is approximately normal, what proportion of children have a score of X = 17 or more? Answer the following questions: a. On the drawing of the normal distribution, show the mean, standard deviation, and the location of X = 17. Shade in the area that corresponds to the proportion of children with a score of 17 or more. (2 points) b. Convert X= 17 to z. (2 points) c. Using the z table, find P(X> 17)= (2 points)
Transcribed Image Text:3. Research suggests that the average level of anxiety has increased gradually over the past 60+ years. In the 1950s, the average score on the Child Manifest Anxiety Scale was µ = 15.1, with o = = 4. Assuming that the distribution of anxiety scores is approximately normal, what proportion of children have a score of X = 17 or more? Answer the following questions: a. On the drawing of the normal distribution, show the mean, standard deviation, and the location of X = 17. Shade in the area that corresponds to the proportion of children with a score of 17 or more. (2 points) b. Convert X= 17 to z. (2 points) c. Using the z table, find P(X> 17)= (2 points)
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