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The number of words in the active vocabulary of children of a particular age is normally...

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Statistics

The number of words in the active vocabulary of children of aparticular age is normally distributed with a mean of 3000 and astandard deviation of 500.

Use the Normal Curve Table to determine the number of words achild needs to have in his/her vocabulary in order to beincluded

(a) among the top 5% of vocabulary scores

(b) among the top 20% of vocabulary scores

(c) among the bottom 10% of vocabulary scores

Answer & Explanation Solved by verified expert
3.9 Ratings (370 Votes)
Solution mean 3000standard deviation 500Using standard normal tablea PZ z 51    See Answer
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