Find the standardized test statistic t for a sample with n=12, x=17.2, s=2.2, and a=0.01 if H0: u=16

What is always true when two whole numbers are subtracted?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details