1 A

In a standard normal model which values of Z cut off the middle 98%

1B

An archer has a probability of 0.70 that she will hit her target. If she shoots at the target 9 times, what is the probability that she will hit the target at least 8 times?

A) 0.8444

B) 0.1556

C) 0.1666

D) 0.8040

E) 0.1960

1C

Which of the following is not a property of correlation?

A) Correlation has no units

B) Correlation is always between -1 and +1

C) The sign of correlation coefficient gives the direction of the association

D) Correlation treats x and y symmetrically

E) Correlation shows the direction of influence between two variables