WINTER BREAK NOTATION REVIEW Flashcards by Joseph Nystrom

Q

population mean

A

mu

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Q

sample mean

A

x-bar

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Q

population st. dev

A

sigma

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Q

sample st. dev

A

s

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Q

Residual

A

y - yhat

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Q

IQR

A

Q3-Q1

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Q

pop proportion

A

p

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Q

sample proportion

A

p-hat

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Q

population variance

A

sigma^2

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Q

sample variance

A

s^2

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Q

predicted y

A

y-hat

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Q

sample size

A

n

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Q

population size

A

N

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Q

difference of population means

A

mu 1 - mu 2

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Q

difference of sample means

A

xbar 1 - xbar 2

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Q

difference of population proportions (%)

A

p 1 - p 2

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Q

difference of sample proportions

A

phat 1 - phat 2

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Q

nCr formula

A

n! / r! n-r!

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Q

5! Meaning

A

54321

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Q

SE for 1-proportion inference

A

root (pq/n)

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Q

SE for 1-mean inference

A

sigma/root n

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Q

ME for 1 prop (95% interval)

A

2* root (pq/n)

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Q

ME for 1 mean (95% interval)

A

2* s/root n

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Q

Outlier fences

A

Q1- 1.5IQR and Q3+1.5IQR

Q

Expected first success?

A

1/p

Q

Expected number of successes?

A

np

Q

two independence formulas

A

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

Q

Null Hypothesis

A

Ho

Q

Alternative Hypothesis

A

Ha

Q

mu

A

population mean

Q

x-bar

A

sample mean

Q

sigma

A

population st. dev

Q

s

A

sample st. dev

Q

y - yhat

A

Residual

Q

Q3-Q1

A

IQR

Q

p

A

pop proportion

Q

p-hat

A

sample proportion

Q

sigma^2

A

population variance

Q

s^2

A

sample variance

Q

y-hat

A

predicted y

Q

n

A

sample size

Q

N

A

population size

Q

mu 1 - mu 2

A

difference of population means

Q

xbar 1 - xbar 2

A

difference of sample means

Q

p 1 - p 2

A

difference of population proportions (%)

Q

phat 1 - phat 2

A

difference of sample proportions

Q

n! / r! n-r!

A

nCr formula

Q

54321

A

5! Meaning

Q

root (pq/n)

A

SE for 1-proportion inference

Q

sigma/root n

A

SE for 1-mean inference

Q

2* root (pq/n)

A

ME for 1 prop (95% interval)

Q

2* s/root n

A

ME for 1 mean (95% interval)

Q

Q1- 1.5IQR and Q3+1.5IQR

A

Outlier fences

Q

1/p

A

Expected first success?

Q

np

A

Expected number of successes?

Q

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

A

two independence formulas

Q

Ho

A

Null Hypothesis

Q

Ha

A

Alternative Hypothesis