hypothisis

Question 1

The Null hypothesis or 𝑯𝟎

means what

Answer 1

Null means empty, no value, or NO CHANGE.
* The null hypothesis, AKA the default hypothesis
* The null hypothesis states that you expect no change, or the
currently value is accepted.
* It is important to remember, as you will see in later classes.
* You either accept it or reject a hypothesis…
* A hypothesis is not a theory but could become one if given
sufficient supporting evidence.
5

Question 2

The Alternative Hypothesis… 𝑯𝒂

Answer 2

The Alternative Hypothesis is states something is, will, or has ,
changed.

Question 3

what is the study hypthis normallhy

Answer 3

alt hypothisis

Question 4

α =

Answer 4

acceptable error

Question 5

what are the numers for rejecting null what do they mean

Answer 5

α>.05 1 in 20 (standard level in physiology and psychology)
* α> 0.01 1 in 100 (more statistically rigorous, better physiology standard)
* α > 0.001 1 in 1000 (typical new engineering standard)
* α≈ 2.87×10−7 or 1 in 3 million (standard for theoretical physics) 5 sigma
7

Question 6

Logic of choice as it relates to hypothesis testing

Answer 6

When you chose one thing, at the same time you fail to
chose the other

Question 7

A type I error

Answer 7

is the rejection of a
true null hypothesis (you state something has changed when
it did not)
* Fire alarm rings and there is no fire.
* You indicate you detect a change (and rejected the null
hypothesis) when a change did not occur

Question 8

the chance of making a type one erroe is called

Answer 8

a or alpa

Question 9

Type II errors

Answer 9

is the failure to
reject a false null hypothesis (you state something did not
change, but it did)
* Fire alarm fails to ring when there is a fire
* Something has change but you did not recognize the
change

Question 10

what is the sympole for likely hood of conducting a type 2 error

Answer 10

is the failure to
reject a false null hypothesis (you state something did not
change, but it did)
* Fire alarm fails to ring when there is a fire
* Something has change but you did not recognize the
change

Question 11

The hypothesis you wish
to test will greatly
influence

Answer 11

study
design…
* Your study design will
represent the hypothesis
you can tes

Question 12

study design foucoses

Answer 12

on how a study is conducted