What would be the necessary statistics formulas for these questions and can you explain why those were chosen over other potential formulas? Thanks

Statistics: Written Problem Set 1 Directions: 1. Solve the following problems. Hand write your solutions and explanations on your own paper. Do not write answers on this page Show your work AND explain your reasoning using complete English sentences. Explanations must directly follow the solution for each part of the problem. 3. You must write your name on the top right of the paper you turn in. 4. You must write the title of this problem set on the top of your paper. 5. Turn in your solutions following the directions in the assignment information on Canvas. 1. Listed below are the heights from a sample of male students (in inches). 75 72 72 73 74 65 69 74 70 70 71 75 71 75 69 75 78 70 a. [3 pts] Create an ordered stem and leaf display for these data. b. [1 pt] How many students are measured? c. [1 pt] What percentage of students are at least 70"? (Round to 1 decimal place.) 2. As of 2017, the following are the ages, in chronological order, at which the last 30 U.S. Presidents were inaugurated: 70 47 54 46 64 69 52 61 56 55 43 62 60 51 54 51 55 56 51 42 54 55 55 55 47 50 49 54 46 56 a. [3 pts] Organize the data by creating a frequency distribution using the following classes: 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, and 70- 74 b. [1 pt] How many of the last 30 U.S. Presidents were inaugurated while in their 50's? c. [1 pt] What percentage of the last 30 U.S. Presidents were inaugurated at the age of 60 or later? (Round to 1 decimal place.) Statistics Written Problem Set 1