Exam 3 - Hypothesis

Question 0

Null hypothesis

Answer 0

Is a hypothesis that states that population parameter, such as population mean, equals a specified value or a parameter from another population

Question 1

A statistical hypothesis

Answer 1

Is a claim about a population parameter and determines what we actually test

Question 2

Alternative hypothesis is

Answer 2

the opposite of null hypothesis, so it states that the population parameter does not equal a specified value or another parameter

Question 3

The alternative hypothesis can be directional or

Answer 3

One-sided, that is we suspect that the population parameter is greater than or less than some value

Question 4

Hypothesis tests find stat answers to

Answer 4

Questions about our processes and products

Question 5

Alpha is

Answer 5

The probability of rejecting a null hypothesis that is true. Always select before performing the hypothesis test

Question 6

P-value is the area to the right of the test statistic, it is a

Answer 6

Probability of obtaining a test stat that is at least as extreme as the calculated value if the null hypothesis is true

Question 7

If p-value is less or equal to alpha

Answer 7

Reject the null hypo and the results are stat significant

Question 8

P-values indicates wether our results are stat significant, does it mean they are practically significant?

Answer 8

Not always

Question 9

Power

Answer 9

Is likelihood that we will find a significant effect when one exists

Question 10

Beta is

Answer 10

The probability of making a type II error

Question 11

Alpha is

Answer 11

The probability of rejecting a null hypothesis that is true