Question

The average age in the senior year is 22, with an SD of 0.7. The z-score of my age is z=1.98. My age is age=______. The z-score of your age is z=-0.03. Your age is age=_______. The z-score of my friend’s age is z=-2.23. My friend’s age is age=_______. The z-score of someone’s age is z=3.02. That person’s age is age=________. The probability that a randomly chosen observation fall between z=-1 and z=1 is __________. The probability that a randomly chosen observation fall between z=-2 and z=2 is __________. The probability that a randomly chosen observation fall between z=-3 and z=3 is __________.

Answer 1

The average age in the senior year is ,

with an SD of

The z-score of my age is z=1.98. My age is age=

The z-score of your age is z=-0.03. Your age is age=

The z-score of my friend’s age is z=-2.23. My friend’s age is age=

The z-score of someone’s age is z=3.02. That person’s age is age=

The probability that a randomly chosen observation fall between z=-1 and z=1 is 68%

The probability that a randomly chosen observation fall between z=-2 and z=2 is 95%

The probability that a randomly chosen observation fall between z=-3 and z=3 is 99.7%