OBFW Publishers Frequency of births (in thousands) 500- 400- 300- 200- 100- 0 10 number of births: Births by mother's age (2008) 487 470 460 62 percentage of births: 202 369 415 441 403 20 30 Mother's age (in years) 326 252 177 99 46 40 17 Use the provided histogram to answer questions about the number of births for each age group. How many births occurred among women over the age of 38? 50 What percentage of births occurred among women between the ages of 16 and 18? Give your answer to one decimal place. %

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A:

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Q: The ?z value for a 96.6% confidence interval estimate is A. 1.96 B. 2.00 C. 2.12

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