Question

example 7: vaccination and measles cases
vaccination rate (%) measles cases
0 1000
20 800
40 600
60 300
80 100
100 20
two students made the following claims:

• claim a: as vaccination rates increase, measles cases decrease.
• claim b: vaccination has no effect on measles cases.

question: evaluate both claims by determining which one is best supported by the data. explain why the other claim is not supported.

Explanation:

As the vaccination rate increases from 0% to 100% in the data, the number of measles cases decreases from 1000 to 20. This shows a clear negative - correlation between vaccination rate and measles cases. So, Claim A is supported. Claim B is not supported because the data clearly demonstrates a change in the number of measles cases as the vaccination rate changes.

Answer:

Claim A is best supported by the data. Claim B is not supported because the data shows that as vaccination rates increase, measles cases decrease, indicating that vaccination has an effect on measles cases.