12. From the most recent national census, it is found that the number ofchildren (X) in American families follows the following probabilitydistribution:Number of Proportion ofchildren, X families. P(x)0..****........ 0.481. . 0.202..0.153..4.5.6.0.080.05............0.03.*.........0.01.........It is assumed that the proportion of families with more than six childrenis negligible.a. Find the expected value and standard deviation of X.b. Form a stick diagram of this distribution. Is the distribution skewed?c. find var(X).

Expected value is also known as mean. It is calculated by the product of each observation and the…

12. From the most recent national census, it is found that the number of children (X) in American families follows the following probability distribution: Number of Proportion of children, X families. P(x) 0 . 0.48 1. . 0.20 2. . 0.15 3.. ..... .... 0.08 4. .... 0.05 5. ****.... 0.03 .... 0.01 It is assumed that the proportion of families with more than six children is negligible. a. Find the expected value and standard deviation of X. b. Form a stick diagram of this distribution. Is the distribution skewed? c. find var(X).

12. From the most recent national census, it is found that the number of children (X) in American families follows the following probability distribution: Number of Proportion of children, X families. P(x) 0 . 0.48 1. . 0.20 2. . 0.15 3.. ..... .... 0.08 4. .... 0.05 5. ****.... 0.03 .... 0.01 It is assumed that the proportion of families with more than six children is negligible. a. Find the expected value and standard deviation of X. b. Form a stick diagram of this distribution. Is the distribution skewed? c. find var(X).

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.8: Probabilities Of Disjoint And Overlapping Events

Problem 2C

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