Hello, I am taking a biostatistics course and am a bit confused on how to find the t value and calculate for number one. I am also confused on the p...

Hello,

I am taking a biostatistics course and am a bit confused on how to find the t value and calculate for number one. I am also confused on the p value for number 2. Can someone please explain in detail for me .

Chapter 10, Problem 11

Body mass index is calculated by dividing a person's weight by the square of his or her height; it is a measure of the extent to which an individual is overweight. For the population of middle-