Out of 400 people sampled, 288 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places please explain how to do this using excel. Excel is how my teacher wants us to find the answers but I dont know what formula to use.

you are provideded with the dataset representing the scores of a group of students who underwent a new tutoring program to improve their math skills. The mean national score is 75. You want to determine if the new tutoring program had a significant positive impact on the students scores. Which type of test should you conduct? State the null and research hypotheses.

Suppose that the mean score of a class of 34 students was 79. The 15 male students in the class had a mean score of 62. What was the mean score for the 19 female students? Mean Score for Female Students = preview answers

two exams were given to a class. The scores on the first exam ranged from 30 to 90, and the scores on the second exam ranged from 70 to 75. You are asked to guess the mean score for each exam. Which of your guesses do you think is more likely to be closer to the true mean? Why?