Core Knowledge in Scholarly Activities Flashcards

1
Q

Test with high sensitivity

A

Patient with disease will have a positive test

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2
Q

Test with high specificty

A

Healthy patient will have negative test

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3
Q

The positive or negative predictive value of any test depends on this measurement

A

Prevalence of the condition in the population being tested

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4
Q

Correlation coefficient interpretation

A

1 = strong positive association
0 = no association
-1 = strong negative association

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5
Q

When to use a t test

A

Comparing two groups with continuous variables (e.g., IQ score)

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6
Q

When to use a paired t test

A

To compare the same patients (i.e., before and after)

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7
Q

When to use a Fisher exact test or chi-squared test

A

Comparing two groups with categorical variables (e.g., insured or uninsured)

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8
Q

Type I error in hypothesis tseting

A

False positive; p value = chance of type I error

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9
Q

Type II error in hypothesis testing

A

False negative; prevent it with a power calculation

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10
Q

What percentage of data on a normal curve falls within 2 standard deviations (SD)?

A

95%
(68% within 1 SD, 99.7% within 3 SD)

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