6. Data Analysis (Part B)

Since we found that a person's BMI is not related to his height, we have decided to explore a little further and analyze if a person's BMI is related to his weight.

Research question: Is a person's BMI related to his weight?

H0: A person's BMI is not related to his weight.
H1: A person's BMI is related to his weight.

A scatter plot was generated.

The scatter plot appears to follow a general positive linear trend, and there is no violation of the linearity assumption.

Then we compute the Pearson's r.

From the table above, Pearson's r value is 0.880. This shows that there is a positive and very strong relationship between BMI and weight. The p value is 0.000, which is less than 0.05.
When p is less than or equal to 0.05 we reject null hypothesis.

In conclusion, a person's BMI is related to his weight.