Exam 2 F23

Question 1

We also did clinical statistics, which included:

Accepted Answer

Comparing CI overlap to a meaningful value

Question 2

Set alpha to 0.10 when:

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you are conducting pilot studies or studies with small n

Question 3

In this example, a meam with "de" superscript is the same as means with __ superscript(s): CHOOSE TWO

Accepted Answer

e, cd

Question 4

If an ANOVA is significant, conduct __ to determine which means are different from which

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post hoc test

Question 5

Most common CI is 95%; so, __ can be used in the equation for Z as a quick estimate

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2

Question 6

The critical Z value is 1.645 -- with what sign(s) ?

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+

Question 7

When using 95% CI -- an outcome with a wider CI is:

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Less desirable

Question 8

Clinically, blood O2 levels should be over 95% -- desirable direction is:

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> 95%

Question 9

Read the table as means with different superscripts are __ other means:

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different from

Question 10

Alpha is the more serious error than Beta:

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True

Question 11

Setting alpha to 0.01 ___ the Type II error:

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increases

Question 12

The test stat ended up being +2.002 and CV is +1.645 -- you should (CHOOSE TWO):

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conclude there is a real change, Reject Ho

Question 13

Alpha is also known as:

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False positive

Question 14

Power is:

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1 - beta

Question 15

Actual p = 0.07 -- this also suggests the intervention has (CHOOSE TWO):

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marginal significance, Trend or tendency of a change from the comparator

Question 16

In the figure, probability is:

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the area or percentage under the curve

Question 17

The probability of getting an A is 0.5 or B is 0.3 -- what is the probability of getting an A or B?

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0.8

Question 18

Type I Error is known as:

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Alpha

Question 19

ANOVA compares:

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> two sample means

Question 20

Power is (Pick two):

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Finding a change when you should, Reject Ho when Ho is False

Question 21

Non parametric data is (CHOOSE TWO):

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More subjective in nature (like Stress Level), Ordinal (Qualitative)

Question 22

You find a Sig effect at 0.01 -- will you find it at 0.05?

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Yes

Question 23

The figure illustrates a __ test: (CHOOSE TWO):

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Directional, One-sided

Question 24

The test stat is calculated from the data -- so the sign of the test statistic should:

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be based on the calculation from the data

Question 25

Confidence is:

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1 - alpha

Question 26

Clinically, blood O2 levels should be over 95% -- so, to be clinically important:

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The CI can cross, as long as most of the CI should be above 95%

Question 27

So -- statistically, any CI that crosses 95% ___ from 95%:

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not different

Question 28

Actual p = 0.07 -- this is determined as the area related to:

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Calculated test stat

Question 29

In Unit 2, we did inferential statistics, which include (PICK TWO):

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Estimation using CI, Hypothesis testing

Question 30

As Power goes up, beta goes...

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down

Question 31

Confidence of an outcome occuring is the same as saying:

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Probability

Question 32

Actual p = 0.07 -- using the standard alpha, you should: (PICK TWO)

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conclude any difference between means is due to chance, fail to reject Ho

Question 33

Set alpha to 0.01 when:

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you want to be really sure making the right conclusion

Question 34

These TWO represent wrong hypothesis decisions (that is, errors):

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Alpha, Beta

Question 35

Alpha is set by the researchers as the area in the (CHOOSE TWO):

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Rejection region, Tail of the curve

Question 36

Actual p = 0.07 -- this suggests you may have:

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Type II error

Question 37

For p = 0.07, there is over 5% probability of making the __ hypothesis decision in concluding a Sig difference:

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wrong

Question 38

Type II error is (Pick two):

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Fail to Reject Ho when Ho is False, Not finding a change when you should

Question 39

Probability is NOT:

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Only applied to past events

Question 40

CI focus on this area of the curve:

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Center where most common (expected) values are found

Question 41

Most common power:

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0.80 to 0.90

Question 42

Most common alpha:

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0.05

Question 43

When using 95% CI to make hypothesis decisions -- those that overlap each other are __ different:

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NS

Question 44

Dr. Appeddu wants to see blood O2 levels to be over 95% -- as a statistical boundary, this is:

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absolute

Question 45

The probability of students passing exam 2 is 99.7%. What is the probability of NOT passing exam 2 as a decimal?

Accepted Answer

0.003

Question 46

The research hypothesis for ANOVA is:

Accepted Answer

At least one mean is different than another mean

Exam 2 F23

Questions 46

Exam 2 F23

Questions 46