Teranda is a medical researcher. She asks 25 subjects their blood type and makes the following relative frequency table to show the results:
Blood Type Frequency Relative Frequency
A 10 1025 = ?%
B 4 425 = ?%
AB 2 225 = ?%
O 9 925 = ?%
Then, Teranda makes a percent bar graph to summarize her results. How far up do the bars for Type A and Type B go?
To find the relative frequency for each blood type, we first sum up the frequencies: 10 + 4 + 2 + 9 = 25.
Now, we can calculate the relative frequency for each blood type by dividing the frequency for that type by 25 and multiplying by 100 to get the percentage:
- Type A: 10/25 * 100 = 40%
- Type B: 4/25 * 100 = 16%
- Type AB: 2/25 * 100 = 8%
- Type O: 9/25 * 100 = 36%
Now, in the percent bar graph, the bars for Type A and Type B should go up to 40% and 16% respectively.