z can be any number
yes, it can be smaller, equal or larger to the true value of the population varience.
False. The standard deviation of a set is the square root of the variance, so it is not always smaller; in fact, it is always less than or equal to the variance when the variance is positive. The standard deviation can be equal to the variance only when the variance is 1 (since the square root of 1 is 1).
True
true
True
True.
Yes, it is generally true that kinetic friction is always greater than the maximum value of static friction.
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.
No. They are the same.
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