Flashcards in CH 2 Deck (14):

1

## Relative Frequency

### The proportion (or percent) of observations within a category. Divide the frequency by the sum of all of the frequencies

2

## Inferential statistics

### Take a sample of data and then apply it to the population.

3

## Descriptive statistics

### Organizing and summarizing data

4

## Uniform Distribution

### The frequency of each value of the variable is evenly spread out across the values of the variable

5

## Bell-Shaped Distribution

### The highest frequency occurs in the middle and frequencies tail off to the left and right of the middle so the graph looks like the profile of a bell.

6

## Skewed Right

### The tail to the right of the peak is longer than the tail to the left of the peak.

7

## Skewed Left

### The tail to the left of the peak is longer than the tail to the right of the peak

8

## Determine the class width

###
The width is equal to the width of each bar on the histogram.

- Range of values / class width

9

## Determine percentage decrease

### a - b / a

10

## Determine percentage increase

###
a-b/b

when b = low number

11

## The misery index

### Sum of unemployment rate and the inflation rate

12

## Classes

### aka How many categories are there?

13

## Lower class limit

### = lowest value in class

14