Quiz 1

Question 1

Indirect hypothesis

Answer 1

You cannot see it happen b/c you cannot see it (too small) or it has already happened (driven by predictions on things we know)

Question 2

Null hypothesis (Ho)

Answer 2

No, effect, difference, or relationship between studied variables.
- idea that there is no real change

Question 3

Alternative hypothesis (HA)

Answer 3

The hypothesis we actually test

Question 4

P-value

Answer 4

Probability of committing a type 1 error if null is rejected. You want this number to be as small as possible (between 0-1)

Question 5

Statistical test

Answer 5

Is performed to determined probability

Question 6

Test statistic

Answer 6

Value calculated from the data that describes how reliably different the samples from eachother are

Question 7

Probability distribution

Answer 7

If you take 2 groups of numbers and randomly pull, what would the distribution of numbers look like

Question 8

Alpha

Answer 8

The maximum acceptable risk of making a type 1 error

Question 9

Significant

Answer 9

Likely to be real
- at least 95%

Question 10

Two-tailed hypothesis

Answer 10

Could be positive or negative
- specifies direction