Stats's Final Part II Flashcards Preview

jeremy harmon > Stats's Final Part II > Flashcards

Flashcards in Stats's Final Part II Deck (22):
1

Type 1 error

Rejects null hypothesis when it is actually true

2

Confidence Interval

A possible range of values for the population parameter

3

Null Hypothesis

A claim to be tested

4

Z-scores

Number of standard deviations that the observation falls above or below the mean

5

Point estimate

When a single value is given as an estimate of a parameter

6

What is the symbol of null hypothesis

Ho (letter H lowercase o)

7

Shorthand Distribution Formula

N( μ, σ)

8

What makes an observation independent?

random sample that is less than 10% of population

9

Sampling Distribution

Distribution of a statistic that comes from multiple samples from one population

10

What does σ stand for?

Standard Deviation

11

T-table

the t-distribution degrees of freedom

12

What does μ stand for

Means

13

Type 2 error

Failure to reject null hypothesis

14

Degrees of Freedom Formula

n-1

15

Normal Distribution Model

bell shaped curve that is symmetric and has one maximum

16

When is t-distribution needed?

When you draw conclusions on a sample mean

17

Standard Normal Distribution is

When the μ= 0 and σ = 1

18

T distribution

Single parameter that is centered at zero

19

What does n symbolize

Sample Size

20

Alternative Hypothesis

Claim to be tested that is within possible parameter values

21

What is the notation for alternative hypothesis?

HA:μ

22

What is the notation for null hypothesis

Ho: μ

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