Biostatistics Using R Question Answer 2022

Running head: BIOSTATISTICS USING R
Biostatistics Using R
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BIOSTATISTICS USING R
1
Table of Contents
Answer to Question 1.A.............................................................................................................2
Answer to Question 1.B.............................................................................................................2
Answer to Question 1.C.............................................................................................................2
Answer to Question 1.D.............................................................................................................3
Answer to Question 2.A.............................................................................................................4
Answer to Question 2.B.............................................................................................................5
Answer to Question 3.................................................................................................................5
Answer to Question 4.A.............................................................................................................6
Answer to Question 4.B.............................................................................................................7
Answer to Question 4.C.............................................................................................................7
Answer to Question 4.D.............................................................................................................7
Answer to Question 4.E.............................................................................................................7
Reference and bibliography.......................................................................................................9

BIOSTATISTICS USING R
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Answer to Question 1.A
The calculated lower and upper 95% confidence interval of mean grip strength is
31.58384 and 32.5898 respectively. From this it can be said that one can be 95% confident
that the true mean of grip strength will lie between 31.58384 and 32.5898. A confidence
interval provides the range of possible values for a population parameter (Kaps &
Lamberson, 2017).
Answer to Question 1.B
The above mentioned 95% confidence interval for mean grip strength presents that the
grandparent carers’ mean grip strength in Parramatta is significantly different from 33 kgs at
the 0.05 significance level (Le & Eberly,.2016).
The reason behind the insignificant mean grip strength value of 33 kg is that it lies
outside the 95% confidence interval which is (31.58384, 32.5898).
Answer to Question 1.C
The Null Hypothesis (H0): The mean difference of grip strength between male and female is
significantly zero.
Alternative Hypothesis (HA): The mean difference of grip strength between male and
female is not significantly zero.
The Significance Level: In this Welch test, the significance level is set at 0.05 which is
generally used in all statistical tests.