Hello, could you please help me solve these problems? And please explain everything that I should know? Explain everything you think the reader should know. (without using excel) Student 1 Student 2...

Hello, could you please help me solve these problems? And please explain everything that I should know? Explain everything you think the reader should know.
(without using excel)

∝=0.05

1.  Construct a confidence interval to estimate the mean weight.

      2.

1. Find the correlation coefficient between height and weight.


2. Construct the equation of the regression line.


3. Predict the weight of a student who is 68 inches tall.