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The ACT test is standardized to a Normal model with a mean of 21 and a standard deviation of 3. a) Draw the model for these ACT scores. Clearly label it, showing what the 68-95-99.7 Rule predicts about the scores. b) In what interval would you expect the central 95% of ACT scores to be found? Show work or explain this answer. c) About what percent of people should have ACT scores above 30? Show work or explain this answer. d) About what percent of people should have ACT scores between 18 and 24? Show work or explain this answer.

The ACT test is standardized to a Normal model with a mean of 21 and a standard deviation of 3. a) Draw the model for these ACT scores. Clearly label it, showing what the 68-95-99.7 Rule predicts about the scores. b) In what interval would you expect the central 95% of ACT scores to be found? Show work or explain this answer. c) About what percent of people should have ACT scores above 30? Show work or explain this answer. d) About what percent of people should have ACT scores between 18 and 24? Show work or explain this answer.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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The ACT test is standardized to a Normal model with a mean of 21 and a standard deviation of 3. a) Draw the model for these ACT scores. Clearly label it, showing what the 68-95-99.7 Rule predicts about the scores. b) In what interval would you expect the central 95% of ACT scores to be found? Show work or explain this answer. c) About what percent of people should have ACT scores above 30? Show work or explain this answer. d) About what percent of people should have ACT scores between 18 and 24? Show work or explain this answe swer.
Transcribed Image Text:The ACT test is standardized to a Normal model with a mean of 21 and a standard deviation of 3. a) Draw the model for these ACT scores. Clearly label it, showing what the 68-95-99.7 Rule predicts about the scores. b) In what interval would you expect the central 95% of ACT scores to be found? Show work or explain this answer. c) About what percent of people should have ACT scores above 30? Show work or explain this answer. d) About what percent of people should have ACT scores between 18 and 24? Show work or explain this answe swer.
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