An article presents a new method for timing traffic signals in heavily traveled intersections. the effectiveness of the new method was evaluated in a simulation study. in 50 simulations, the mean improvement in traffic flow in a particular intersection was 653.5 vehicles per hour, with a standard deviation of 311.7 vehicles per hour. a traffic engineer states that the mean improvement is between 581 and 726 vehicles per hour. with what level of confidence can this statement be made? express the answer as a percent and round to the nearest integer. the level of confidence is what % ?

Will give brainliest plz hurry lexie surveyed 4 teenagers to find out approximately how many hours, per week, they read for fun, and how many siblings they have. brooke said she reads about 10 h a week for fun, and that she has 5 siblings. celia said she has 1 brother and 1 sister and reads for fun about 3 h each week. henry said he has 2 brothers and reads for fun about 30 min each week. jude said he doesn't read for fun and has 3 brothers and 3 sisters. use this information to complete the data table. express your answers as whole numbers or decimals. name hours of fun number of siblings brooke celia __ henry jude