4.19. The Mental Development Index (MDI) ofthe Bayley Scales of Infant Development is a standardized measure used

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4.19. The Mental Development Index (MDI) ofthe Bayley Scales of Infant Development is a standardized measure used in studies with high-risk infants. It has approximately a normal distribution with a mean of 100 and a standard deviation of 16.

(a) What proportion of children have a MDI of at least 120?

(b) Find the MDI score that is the 90th percentile.

(c) Find and interpret the lower quartile, median, and upper quartile of MDI.

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Statistical Methods For The Social Sciences

ISBN: 9781292021669

4th Edition

Authors: Barbara Finlay, Alan Agresti

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Question Posted: Sep 21, 2024 11:01 AM

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4.19. The Mental Development Index (MDI) ofthe Bayley Scales of Infant Development is a standardized measure used

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Statistical Methods For The Social Sciences

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