# Stats 10

### Card Set Information

 Author: camturnbull ID: 287141 Filename: Stats 10 Updated: 2014-10-26 18:21:58 Tags: Psychology Stats Folders: Psychology,Statistics Description: BSc Stats Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user camturnbull on FreezingBlue Flashcards. What would you like to do?

1. What is the normal distribution?
• A family of curves, each defined by the standard deviation and mean (σ+µ)
• The differences are measured as standard deviations
2. Why do the measures of central tendency all have the same value on the normal distribution?
• It is symmetrical, no matter the parameters, the normal distribution preserves its perfect bell shape
• Different variances make it wider, different means make it shift in their direction
3. What is the standard normal distribution?
• A type of standard distribution curve with a mean of 0
• Values on this curve are known as z scores
4. What is suggested by the central limit theorem?
Many naturally occurring variables will tend to fall close to the normal distribution
5. How might one use a normal distribution curve to find the probability of an eventuality over a specific point?
Draw a vertical line on the curve at the point
6. Give the equation for converting a normal score into a z score
• This is the same formula for generating standard scores
7. What are scores to the right and to the left of the z score referred to as?
• P(z) for right
• 1-P(z) for left
8. How might one find the area between two values?
• Find the score for the highest value given
• Find the score for the lowest value given
• Minus one by the other
• Eg:
• P(z<+.67)=.749
• P(z< -.67)=.251
• P(-.67<z<+.67)=.749-.251=.498

What would you like to do?

Home > Flashcards > Print Preview