Biostatistics

Question 1

Define biostatistics

Answer 1

A branch of applied statistical methods in health sciences…public health and biological disciplines

Question 2

2 branches of biostas

Answer 2

Descriptive: Concerned with the collection…analysis of data from the sample without making conclusions about the population from which the sample was drawn
Inferential: Involves collection…analysis and interpretation of data from the sample and further make conclusions about the population from which the sample was drawn

Question 3

What is data?

Answer 3

These are quantities or qualities measured or observed that are to be collected and analyzed

Question 4

Types of data

Answer 4

Raw or Primary: It’s in it’s original form in which it was collected…the information is at first hand in order to satisfy a particular statistical enquiry

Question 5

It can be collected;

Answer 5

At a single point in time(cross sectional data) : Data is collected from individuals within a specified period of time. E.g through surveys

At regular intervals(time series) : This is data collected quite often over a long period of time such as weekly..monthly ..yearly

Longitudinally(longitudinal) : Repeated data taken on the same individuals at regular intervals aimed at finding out if there has been a change in behavior

Question 6

Define secondary data

Answer 6

Data that is collected originally to satisfy a particular investigation but has been used now at second hand

Question 7

Sources of data

Answer 7

Records
External sources
Surveys
Experiments

Question 8

Define a Variable

Answer 8

This is any characteristic that when measured it takes up a different value

Question 9

Types of variables

Answer 9

Numeric/Quantitative variable : Numeric
Under this we have discret and continuous

Discret- Whole numbers
Continuous - Values in an interval of the real line….decimal points

Categorical/Qualitative variable : Text form

Question 10

2 attributes of the categorical variable

Answer 10

Dichotomous
Binary variable

Question 11

Define statistics

Answer 11

A field of learning concerned with the collection..organisation.. analysis and interpretation of both numerical and categorical data as well as drawing inferences

Question 12

Dichotomous or Binary

Answer 12

A categorical variable that only has 2 attributes

Question 13

Scale of measurement

Answer 13

The relationship between the values that are assigned with the attributes of a variable