Young children need calcium in their diet to support the growth of their bones.

Question

Young children need calcium in their diet to support the growth of their bones. The Institute of Medicine provides guidelines on how much calcium should be consumed for people of different ages. One study examined whether or not a sample of children consumed an adequate amount of calcium, based on these guidelines. Since there are different requirements for children aged 5 to 10 years and for children aged 11 to 13 years, the children were classified into these two age groups. For each student, his or her calcium intake was classified as meeting or not meeting the requirement. There were 2037 children in the study. Here are the data:

Find the percent of children 11 to 13 years old who met the calcium requirement. (Use decimal notation. Give your answer to six decimal places.)

________% of children 11 to 13 years old met the requirement.

Two-way table for "met requirement" and age Met requirement Age (years) 5 to 10 11 to 13 No 186 564 Yes 862 425

Explanation / Answer

11-13 years old total = 564+425 = 989

Of the above met calcium requirement = 425

Hence percentage = 425/989 % = 42.972700

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