Flashcards in Descriptive statistics Deck (16)

Loading flashcards...

1

## Draw __ to check distribution of a continuous variable

### Histogram

2

## Normal distribution is a probability distribution that is:

###
symmetric about the center

data near center are more frequent in occurance

a bell curve in graph form

3

## More data on the left tail than right

### Skewed to the left

4

## More data on the left tail than right

### Skewed to the right

5

## Suggestive of two different populations

### Bimodal

6

##
Most common value for central tendency

not good for data with an outlier or skewed distribution

### Mean

7

##
value in the middle of a ranked data

better for data with an outlier or skewed distribution

### Median

8

##
value that occurs most often

highest bar on histogram

rarely reported for continuous data

### Mode

9

## if mode > median > mean

### data skewed to right

10

## if mean > median > mode

### data skewed to left

11

## Range

###
maximum - minimum

or as interval (min, max)

common measure for spread of data around median

can be misleader in data with outlier

12

## Interquartile range (IQR)

###
Q3-Q1 or (Q1, Q3)

where:

Q1= value that occurs at 1st quarter mark

Q2= value that occurs at 2nd quarter mark (median)

Q3= value that occurs at 3rd quarter mark

Measures better than range for data with outlier

13

## If you count the numbers in each category of a table you are measuring:

### Frequency

14

## If you find the % of each category of a table you are measuring:

### Proportion

15

## Charts for continuous data

### Histogram and Box plot

16