z can be any number
yes, it can be smaller, equal or larger to the true value of the population varience.
True
true
True
True.
Yes, it is generally true that kinetic friction is always greater than the maximum value of static friction.
No. They are the same.
Not true.4 is greater than 2 but 1/4 = 0.25 is NOT greater than 1/2 = 0.5 However, the opposite is also not always true.
sometimes The statement X billion is greater than Y million is sometimes true when the values of X and Y are greater than zero. It is only sometimes true because it is not true when the value of Y is more than 1,000 times greater than X, but it is true when the value of Y is less than 1,000 times greater than X.
No, quite the opposite.
True, as for example 0.6+0.7 = 1.3
yes it is true