Assignment 2 template 9 .docx - HLTH7008 Introduction to...

HLTH7008 Introduction to Biostatistics, Autumn 2022
Assignment 2
Due Sunday May 8, 2022
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Your name: Kim Ngan Vo
Your student number: 20556929
Question 1
a)

The variability of length of stay in hospital looks about equal between two group.
This manifests as both as a similar overall range of values (width of the whiskers) and
a similar interquartile range (width of the box).

The variability of length of stay in hospital looks about not equal between two group.
Length of stay in hospital to be more varied in the language spoken at home is
English group than in the language spoken at home is ‘other’. This manifests as both
as a larger overall range of values (width of the whiskers) and a large interquartile
range (width of the box).
b)
c) Step 1: Set up hypotheses and determine level of significance
Null hypothesis:
- No difference in mean length of stay in hospital between patients whose
language spoken at home is English and patients whose language spoken at home
is ‘other’
Research hypothesis:

- Yes, there is a difference in mean length of stay in hospital between patients
whose language spoken at home is English and patients whose language spoken
at home is ‘other’
- This a two-tailed alternate hypothesis
Let:
- Subscript 1 represent the sample of patients whose language spoken at home is
English and subscript 2 represent the sample of patients whose language spoken
at home is ‘other’.