Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Norm Prob Dist


What's a normal distribution? a continuous probability distribution for random variable x.
What's a normal curve? a graph of norm dist.
What's normal distribution property #1 1. mean, median, mode are equal.
What's normal distribution property #2 2. normal curve is bell shaped and symmetric about the mean.
What's normal distribution property #3 3. total area under normal curve equals 1.
What's normal distribution property #4 4. normal curve approaches, but never touches, the x-axis as it extends further away from mean.
What's normal distribution property #5 5. B/w u-o & u=o (in the center of the curve) graph curves upward to the left of u-o & to the right of u+o.
what are inflection points points at which curve changes from curving upward to curving downward
what's the formula to find the z-score? (x-u)/o
What's a standard normal distribution? normal distribution with mean of 0 and standard deviation of 1
what are the properties of a standard normal distribution? (1).cumulative area (CA) is close to 0 for z-scores close to z=-3.49 (2) CA increases as z-scores increase (3) CA for z=0 is .5000 (4) CA is close to 1 for z-scores close to z=3.49
how do you find the area to left of z score use stand norm table.
dow do you find area to right of z score b. 1 - (left of z, use table to find)
how do you find area between 2 z-scores find area to left of each z-score using table. Subtract high from low #.
what's the area to LEFT of z=1.23? Area to left=.8907 (coordinates: 1.2, .03)
What's the area BETWEEN z=1.23 and z=-.75? 1.23=.8907, -.75=2266, so area b/w=.8907-.2266=.6641
What's the area to RIGHT of z=1.23? Area to right=1-.8907=.1093
Created by: Erushi Amaya Erushi Amaya