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Flashcards in Hypothesis Testing Deck (14)
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1

What is the research hypothesis and what is the null hypothesis?


the research hypothesis is H1 - the theory about the relationship or differences

the null hypothesis is that ther eis no relationship or no difference

2

Do we test the null hypothesis or the research hypothesis?


the null hypohtesis

we have to either reject or fail to reject the null

3

What is the difference between directional vs nondirectional hypotheses?


non-directional means we're just looking for an effect or difference without stating which direction we think it wil go - such as group a's scores will be different from group b's

directional has that built into the hypothesis - such as, group a will have higher scores than group b

4

What kind of sample do you need to use the z distribution?


you need normal distribution populations and large samples

5

With single sample hypothesis testing, what needs to already be known?


the population values

 you just compare a single sample to the known population values

6

WHat is the critical region?


the area under tehs ampling distribution that includes unlikely sample outcomes

with a confidence level of 95%, the critical regionhas 5% of the what area under the curve - the area in the tails

7

If the test statistic falls in the critical region, what do we do with the Ho?


We reject it

8

What is the z-score boundary if you do a directional 1-tailed test?


1.65 instead of 1.96

9

If the n is less than 100, what distribution should we use?


student's t

10

If the null hypothesis is correct, the estimates sample statistic is going to be ___ to the population parameter.


closer

11

To look at bivariate associations, what test should you use?


pearson's r

12

what is the range for pearson's r?


-1 and 1

with 0 meaning no relationship

13

What is type 1 error?

type 2 error?


type 1 = alpha error = false positive

type 2 = beta error = false negative

14