Please solve the questions below to your best and I will also make sure we are both satisfied if I am satisfied. I really need help. The textbook is provided below but solve it with what's easier for you ( excel, desmos, etc) and everything is not in the textbook!

Link to textbook if needed: https://drive.google.com/file/d/1HLjRPFT329qKZ-S8h0fra_KsEJYThs8-/view?usp=sharing

Questions:

Question Suppose we are interested in calculating a 95% confidence interval for the mean of a normally distributed population. We've drawn a sample of 10 observations from this population, and found a sample mean of 305.2 and a sample standard deviation of 47.0. What is the appropriate upper endpoint of the 95% interval for mu? (e.g. If the interval is (3,712.9.674), give 9.674 as your response.) (Give your response to at least 3 decimal places. Give only your numeric response, and no extra characters or symbols.) Your Answer: Your Answer Question Consider the following probability distribution for a random variable X. X 3 5 12 p(x) 0.13 0.54? where the question mark represents a missing probability. Find the missing probability, then find the variance of the random variable X. What is the variance of X? (Give your response to at least 3 decimal places. Include only the numeric response, and not any extra characters or symbols.) Your Answer: Your