H0: u=19.1
h1: u< 19.1
your sample consists of 81 subjects, with a mean of 18 and a standard deviation of 3.11
calculate the test statistic, rounded to 2 decimal places
t=
! i used an equation but i don’t know if it’s the right one : (

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.