Hypothesis Testing Flashcards

1
Q

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

A

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

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

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2
Q

Do we test the null hypothesis or the research hypothesis?

A

the null hypohtesis

we have to either reject or fail to reject the null

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3
Q

What is the difference between directional vs nondirectional hypotheses?

A

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

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4
Q

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

A

you need normal distribution populations and large samples

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5
Q

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

A

the population values

you just compare a single sample to the known population values

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6
Q

WHat is the critical region?

A

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

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7
Q

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

A

We reject it

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8
Q

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

A

1.65 instead of 1.96

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9
Q

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

A

student’s t

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10
Q

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

A

closer

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11
Q

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

A

pearson’s r

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12
Q

what is the range for pearson’s r?

A

-1 and 1

with 0 meaning no relationship

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13
Q

What is type 1 error?

type 2 error?

A

type 1 = alpha error = false positive

type 2 = beta error = false negative

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14
Q
A
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