Biostatistics Flashcards
Consists of allocating an observation to one of a multiple of possible categories
Categorical data
Categorical data is classified as
Nominal or ordinal
If there is no ordering of the categories this is
Nominal data
Blood group B is an example of?
- Nominal data.
- Ordinal data.
Nominal data
If there is ranking or ordering of the categories this is
Ordinal data
BMI, social class and opinions are?
- Ordinal data.
- Nominal data.
Ordinal data
Numerical data is classified into
Discrete - Continuous
Relates to whole numbers?
- Discrete.
- Continuous.
Discrete
Relates to fractional data?
Continuous
Numerical data can be described by?
Histograms and Boxplots
Categorical data can be described by?
Bar chart and Pie chart
The peak of a normal distribution is determined by?
- The mean.
- Standard deviation.
A
The shape of the curve in a normal distribution is determined by the
Standard deviation
The mean is mostly representative when the data is
Symmetrically distributed
If all observations are equal to the mean then the SD is
0
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
P values
If the p value is < 0.05 then the result will be statistically significant and the null hypothesis will be ………. ?
- Accepted.
- Rejected.
Rejected
The ….. the P value the …… the significance of the findings.
Smaller - greater
The……. the sample size the …… the CI will be and more precise.
Larger - smaller
Provides a measure of the strength of an association
P value
Require the data to be normally distributed?
- Parametric data.
- Non parametric data.
A
Does not Require that the data is in the normal distribution
Non parametric
Paired parametric of three or more measures ?
- repeated measures ANOVA.
- Paired sample t-test.
A
Paired parametric of 2 measurement
Paired sample t-test
