Test 1 Flashcards

1
Q

Types of error bars

A

SD, SEM, 95% Cl

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2
Q

Conclusion if SD overlaps/ doesn’t overlap?

A

No conclusion/ no conclusion

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3
Q

Conclusion if SEM (standard error) overlaps/ doesn’t overlap?

A

Not statistically significant to be different / no conclusion

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4
Q

Conclusion if 95% CI (confidence interval) overlaps/ doesn’t overlap?

A

No conclusion/ statistically more likely to be different

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5
Q

What is standard deviation

A

Approximate mean of differences between data points and overall mean

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6
Q

What is standard error

A

Estimate of the expected variability of the mean

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7
Q

What is confidence interval

A

Range of values in which the true mean can be expected

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8
Q

If two mean error bars overlap:

A

The difference between the two samples is not statistically significant

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9
Q

When is a t-test used?

A

When there is a dependent and independent variable. It tells us how significant the difference between group means are

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10
Q

If t / X2 value is lower than critical value,

A

The hypothesis is not rejected

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11
Q

If t / X2 value is higher than critical value,

A

Hypothesis rejected

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12
Q

How to determine degree of freedom for t testing

A

n1+n2 -2

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13
Q

How to use the 2-tail test

A

Find row with the right degree of freedom and the column with 95% for the 2-tail confidence level.
-Find the corresponding critical value
— check if t value higher or lower

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14
Q

How to calculate expected outcome

A

(Criteria 1/total number) x (criteria 2)

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15
Q

Degree of freedom calculation for X2 testing?

A

Df =N-1

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