Lecture week 10- CI Flashcards

1
Q

In research what is there always

A
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2
Q

we use samples to give….

A
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3
Q

we use the sample means as an estimate….

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4
Q

what is the confidence interval

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5
Q

what does confidence interval look on a graph

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6
Q

can CI be calculated on any level

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7
Q

what is the most usual level for calculating CI

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8
Q

if the CI is 95% what does this mean

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9
Q

what is the equation for 95% CI

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10
Q

the higher the CI….

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11
Q

if the CI is 50, 90, 95% what statement is stated after

A

of containing the true population mean/parameter

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12
Q

what is the equation for the t-value

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13
Q

where do u find the t-value

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14
Q

what does the t-value depend on

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15
Q

how is SE calculated

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16
Q

how is df calculated

17
Q

is the CI lower limit TO upper limit

18
Q

What are the steps for calculating confidence level

19
Q

what does a wide CI indicate

A

lack of certainty

20
Q

what does a narrow CI Indicate

A

more precise

21
Q

if the complete absence of any effect corresponds to a difference of 0 or a 1 ratio what does this mean

22
Q

what does it mean if the 95% CI around the observed effect size includes the no-effect value (0 for differences, 1 for ratios)

23
Q

what does it mean if the 95% CI around the observed effect size does not include the no-effect value (0 for differences, 1 for ratios)

24
Q

what affects the CI

25
how does CI affect sample size
26
what does H0 mean
27
what does H1 mean
28
when does a type 1 error occur
29
when does a type 2 error occur
30
explain the truth table
31
what are p values and does a p<0.005 indicate significance
32
what is power
33
what is the equation for power
34
what increases power
35
when does power power calculations be carried out
36
as power increases what 2 things decrease
37
what is Statistical Power affected by
38
what does Statistical significance not always imply