Flashcards in Chapter 4 Deck (15):

0

## How do you solve for range?

### Largest X minus smallest X

1

## What's the interquartile range?

### The range of the middle 50% of the scores

2

## For any set of data, the sum of the deviation scores will always be

### 0

3

## If a distribution has a M=50 and s=10, is a score of 65 average?

### No. It's above average.

4

## Variability is scores in a sample is usually _______ the variability of the scores in the population from which the sample was obtained.

### Smaller

5

## As variance go up, error goes

### Up

6

## A population of scores has a u = 50 and o=10. If every score is multiplied by 2, the new mean and standard deviation scores are..?

### u= 100 and o=20

7

## The number of scores that are independent and free to vary is called..?

### Degrees of freedom

8

## What's the formula for SS?

### SS= €X^2 - (€X)^2/N

9

## How do you calculate o^2 for a population? (variance)

### O^2= SS/N

10

## How do you calculate o for a population? (standard deviation)

### Square root of (SS/N)

11

## What is o?

### Standard deviation

12

## What is o^2

### Variance

13

## How do you calculate o^2 for a sample?

### SS/df

14