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ِِEBM > Biostatistics > Flashcards

Biostatistics Flashcards

1
Q

Consists of allocating an observation to one of a multiple of possible categories

A

Categorical data

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2
Q

Categorical data is classified as

A

Nominal or ordinal

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3
Q

If there is no ordering of the categories this is

A

Nominal data

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4
Q

Blood group B is an example of?

  • Nominal data.
  • Ordinal data.
A

Nominal data

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5
Q

If there is ranking or ordering of the categories this is

A

Ordinal data

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6
Q

BMI, social class and opinions are?

  • Ordinal data.
  • Nominal data.
A

Ordinal data

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7
Q

Numerical data is classified into

A

Discrete - Continuous

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8
Q

Relates to whole numbers?

  • Discrete.
  • Continuous.
A

Discrete

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9
Q

Relates to fractional data?

A

Continuous

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10
Q

Numerical data can be described by?

A

Histograms and Boxplots

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11
Q

Categorical data can be described by?

A

Bar chart and Pie chart

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12
Q

The peak of a normal distribution is determined by?

  • The mean.
  • Standard deviation.
A

A

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13
Q

The shape of the curve in a normal distribution is determined by the

A

Standard deviation

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14
Q

The mean is mostly representative when the data is

A

Symmetrically distributed

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15
Q

If all observations are equal to the mean then the SD is

A

0

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16
Q

The smallest level of significance at which the null hypothesis is rejected or the largest level of significance at which the null hypothesis is accepted

A

P values

17
Q

If the p value is < 0.05 then the result will be statistically significant and the null hypothesis will be ………. ?

  • Accepted.
  • Rejected.
A

Rejected

18
Q

The ….. the P value the …… the significance of the findings.

A

Smaller - greater

19
Q

The……. the sample size the …… the CI will be and more precise.

A

Larger - smaller

20
Q

Provides a measure of the strength of an association

A

P value

21
Q

Require the data to be normally distributed?

  • Parametric data.
  • Non parametric data.
A

A

22
Q

Does not Require that the data is in the normal distribution

A

Non parametric

23
Q

Paired parametric of three or more measures ?

  • repeated measures ANOVA.
  • Paired sample t-test.
A

A

24
Q

Paired parametric of 2 measurement

A

Paired sample t-test

25
Q

Unpaired parametric of 3 groups or more.

  • One way ANOVA.
  • Independent samples t-test.
A

A

26
Q

Unpaired parametric of 2 groups

A

Independent samples t-test

27
Q

Paired nonparametric of 3 measures or more?

  • Fried man test.
  • Wilcoxon rank sum test.
A

A

28
Q

Paired nonparametric of 2 measures

A

Wilcoxon rank sum test

29
Q

Unpaired nonparametric of 3 groups and more?

  • Kruskal wallis test.
  • Mann whitney U test.
A

A

30
Q

Unpaired nonparametric of 2 groups

A

Mann whitney U test

ِِEBM (6 decks)

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