How heavy is th average 11 year old?

Short notes of bar graph? Uses of t-score and z-score in the classroom? How many cards in a pack including joker? What is the probability of drawing a card less than 6 from a deck of cards? Two variables that are likely to be correlated because they are both changing over time? What year segragetion ended? If alt or sgpt in the liver function test is 114 what does that mean? i need a gf im 13? What are bars? What are the differences between male and female average total ridge count? Which event occurs first? Why do managers need to know statistical methods? TO ESTIMATE THE AVERAGE AGE OF STUDENTS A SAMPLE OF 50 PARTICIPANTS WAS OBTAINED, WITH A MEAN OF 16 AND A POPULATIONAL VARIATION OF 9, calculate:* POINT ESTIMATE OF THE MEANS* 95% AND 99% CONFIDENCE INTERVAL ESTIMATES FOR THE MEANS? What type of chart is a Gantt Chart? How calculate speed in minutes? What is F Statistic? Which sampling would be appropriate to survey 280000 people? If every 10th student on a nonalphabetized list of names was chosen from your school to answer a survey this group would be an? When should you use a scatter plot? Why and how surveys are conducted?