# WINTER BREAK NOTATION REVIEW Flashcards

1

Q

population mean

A

mu

2

Q

sample mean

A

x-bar

3

Q

population st. dev

A

sigma

4

Q

sample st. dev

A

s

5

Q

Residual

A

y - yhat

6

Q

IQR

A

Q3-Q1

7

Q

pop proportion

A

p

8

Q

sample proportion

A

p-hat

9

Q

population variance

A

sigma^2

10

Q

sample variance

A

s^2

11

Q

predicted y

A

y-hat

12

Q

sample size

A

n

13

Q

population size

A

N

14

Q

difference of population means

A

mu 1 - mu 2

15

Q

difference of sample means

A

xbar 1 - xbar 2

16

Q

difference of population proportions (%)

A

p 1 - p 2

17

Q

difference of sample proportions

A

phat 1 - phat 2

18

Q

nCr formula

A

n! / r! n-r!

19

Q

5! Meaning

A

5*4*3*2*1

20

Q

SE for 1-proportion inference

A

root (pq/n)

21

Q

SE for 1-mean inference

A

sigma/root n

22

Q

ME for 1 prop (95% interval)

A

2* root (pq/n)

23

Q

ME for 1 mean (95% interval)

A

2* s/root n