A child education specialist wanted to study the number of c…

A child education specialist wanted to study the number of correct words a child selected during an exercise, where the random variable X measures the number of correct words. The average number of correct words was found to be 8.92, compute the standard deviation.  Number of Words (x) p(x) 7 0.02 8 0.36 9 0.32 10 0.28 11 0.02

A child selects 2 toys from a box WITHOUT replacement. The b…

A child selects 2 toys from a box WITHOUT replacement. The box contains 6 toy cars and 9 toy animals. Let the random variable X be defined as the number of toy cars selected.  Which probability distribution table below correctly represents the number of toy cars selected?  TABLE A  Number of Toy Cars p(x) 0 0.2625 1 0.2625 2 0.175 3 0.30 4 0.1062   TABLE B  Number of Toy Cars p(x) 0 0.3956 1 0.4945 2 0.1099   TABLE C  Number of Toy Cars p(x) 0 0.30 1 0.525 2 0.175   TABLE D  Number of Toy Cars p(x) 0 0.1429 1 0.5142 2 0.3429