Chapter Practice 1. One hundred and fourteen babies are delivered in the month of May. Of these, 54 are Caucasian, 30 are Hispanic, 20 are African American, and 10 are Asian. Express in fractions how many of these 114 babies are of each race. Remember to convert each fraction to its simplest form. · Caucasian: 54/114 = 9/19 · Hispanic: 30/114 = 5/19 · African American: 20/114 = 10/57 · Asian: 10/114 = 5/57 2. Express in decimals how many of these 114 babies are of each race. Round to two decimal places. · Caucasian: 54/114 = 0.47 · Hispanic: 30/114 = 0.26 · African American: 20/114 = 0.18 · Asian: 10/114 = 0.09 3. Express in percents how many of these 114 babies are of each race. Round to two decimal places. · Caucasian: 54/114 x 100 = 47.37% · Hispanic: 30/114 x 100 = 26.32% · African American: 20/114 x 100 = 17.54 · Asian: 10/114 x 100 = 8.77% 4. A group of 16 men and 24 women have hypertension. Express the ratio of men with hypertension to women with hypertension. Reduce the ratio to its simplest form. · 16:24 = 2:3
5. The following were the recorded birth weights for babies born July 16, 2011: 8.1 lbs, 6.0 lbs, 4.7 lbs, 6.9 lbs, 5.6 lbs, 7.7 lbs, 6.3 lbs, 7.8 lbs, 6.1 lbs, and 9.2 lbs. What was the average birth weight for the day? Round to two decimal places. · 8.1 + 6.0 + 4.7 + 6.9 + 5.6 + 7.7 + 6.3 + 7.8 + 6.1 + 9.2 = 68.4 · Average birth weight: 68.4/10 = 6.84 lbs. 6. A group of 106 children is seen at the hematology specialty clinic in one week. Thirty-six have classic hemophilia type A; 70 have other bleeding or blood disorders. What is the proportion of people in the group that have classic hemophilia type A? Express in a decimal and round to two decimal places. · p= 36/(36+70) · p = 0.34 7. A gynecologist sees 75 women in one week. Forty-two were seen for their annual preventive exam and received Pap smears. Express the rate of Pap smears performed this week. Express the answer in percent. · R = 42/75 x 100 · R = 56%