Stats's Final Part II

Question 1

Type 1 error

Answer 1

Rejects null hypothesis when it is actually true

Question 2

Confidence Interval

Answer 2

A possible range of values for the population parameter

Question 3

Null Hypothesis

Answer 3

A claim to be tested

Question 4

Z-scores

Answer 4

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

Question 5

Point estimate

Answer 5

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

Question 6

What is the symbol of null hypothesis

Answer 6

Ho (letter H lowercase o)

Question 7

Shorthand Distribution Formula

Answer 7

N( μ, σ)

Question 8

What makes an observation independent?

Answer 8

random sample that is less than 10% of population

Question 9

Sampling Distribution

Answer 9

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

Question 10

What does σ stand for?

Answer 10

Standard Deviation

Question 11

T-table

Answer 11

the t-distribution degrees of freedom

Question 12

What does μ stand for

Answer 12

Means

Question 13

Type 2 error

Answer 13

Failure to reject null hypothesis

Question 14

Degrees of Freedom Formula

Answer 14

n-1

Question 15

Normal Distribution Model

Answer 15

bell shaped curve that is symmetric and has one maximum

Question 16

When is t-distribution needed?

Answer 16

When you draw conclusions on a sample mean

Question 17

Standard Normal Distribution is

Answer 17

When the μ= 0 and σ = 1

Question 18

T distribution

Answer 18

Single parameter that is centered at zero

Question 19

What does n symbolize

Answer 19

Sample Size

Question 20

Alternative Hypothesis

Answer 20

Claim to be tested that is within possible parameter values

Question 21

What is the notation for alternative hypothesis?

Answer 21

HA:μ

Question 22

What is the notation for null hypothesis

Answer 22

Ho: μ