Question

1. which of the following is false?

a childs age and a childs shoe size is a positive correlation
the graduation rate in a city and the rate of unemployment in a city is a positive correlation
the cost to mail an envelope and the weight of the envelope is a positive correlation
amount of exercise and percent of body fat is a negative correlation

Explanation:

• **For "a child’s age and a child’s shoe size": As a child grows (age increases), their shoe size generally increases. So, there is a positive correlation. This statement is true.
• **For "the graduation rate in a city and the rate of unemployment in a city": A higher graduation rate might lead to more educated people who are more employable, so there is likely a negative correlation (not positive). This statement is false.
• **For "the cost to mail an envelope and the weight of the envelope": The heavier the envelope (weight increases), the more it costs to mail. So, there is a positive correlation. This statement is true.
• **For "amount of exercise and percent of body fat": More exercise usually leads to less body fat. So, there is a negative correlation. This statement is true.

Answer:

The graduation rate in a city and the rate of unemployment in a city is a positive correlation.