What is the best estimate of the standard deviation of the Normal distribution?
O 0.5
O 1.0
O 3.0
O 5.0

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Which of the following best describes the delian problem?