# 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

54321

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

24
Q

Outlier fences

A

Q1- 1.5IQR and Q3+1.5IQR

25
Q

Expected first success?

A

1/p

26
Q

Expected number of successes?

A

np

27
Q

two independence formulas

A

P(A) = P (A|B) and P(A)*P(B)=P(A and B)

28
Q

Null Hypothesis

A

Ho

29
Q

Alternative Hypothesis

A

Ha

30
Q

mu

A

population mean

31
Q

x-bar

A

sample mean

32
Q

sigma

A

population st. dev

33
Q

s

A

sample st. dev

34
Q

y - yhat

A

Residual

35
Q

Q3-Q1

A

IQR

36
Q

p

A

pop proportion

37
Q

p-hat

A

sample proportion

38
Q

sigma^2

A

population variance

39
Q

s^2

A

sample variance

40
Q

y-hat

A

predicted y

41
Q

n

A

sample size

42
Q

N

A

population size

43
Q

mu 1 - mu 2

A

difference of population means

44
Q

xbar 1 - xbar 2

A

difference of sample means

45
Q

p 1 - p 2

A

difference of population proportions (%)

46
Q

phat 1 - phat 2

A

difference of sample proportions

47
Q

n! / r! n-r!

A

nCr formula

48
Q

54321

A

5! Meaning

49
Q

root (pq/n)

A

SE for 1-proportion inference

50
Q

sigma/root n

A

SE for 1-mean inference

51
Q

2* root (pq/n)

A

ME for 1 prop (95% interval)

52
Q

2* s/root n

A

ME for 1 mean (95% interval)

53
Q

Q1- 1.5IQR and Q3+1.5IQR

A

Outlier fences

54
Q

1/p

A

Expected first success?

55
Q

np

A

Expected number of successes?

56
Q

P(A) = P (A|B) and P(A)*P(B)=P(A and B)

A

two independence formulas

57
Q

Ho

A

Null Hypothesis

58
Q

Ha

A

Alternative Hypothesis