Determine The Differences of Body Mass Index

Running head: STATISTICS
Statistics
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Name of the University:
Author note:

1
STATISTICS
Table of Contents
Answer to the question 1............................................................................................................2
Answer to the question 2............................................................................................................3
Answer to the question 3............................................................................................................4
Answer to the question 4............................................................................................................5
Answer to the question 5............................................................................................................7
Answer to the question 6............................................................................................................8
Answer to the question 7............................................................................................................9
Bibliography.............................................................................................................................11

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STATISTICS
Answer to the question 1
To determine the differences of body mass index (BMI) single sample t-test has been
applied. The reason for selecting this test is that there is only a single variable which have to
test.
Null hypothesis (H0): There is no difference in the body mass index of national mean and the
nurse participants.
Alternative hypothesis (H1): There is a difference in the body mass index of national mean
and the nurse participants.
Table 1 Single sample t-test Output
Test statistic = 2.167
P- Value = 0.033
Alpha = 0.05 (at 5% level)

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STATISTICS
Conclusion:
It has been seen that the P-Value < Alpha. Therefore the null hypothesis is rejected
and at the same time the alternative hypothesis is accepted. Hence it may be summarised that
there is a differences between the body mass index of national mean and the nurse
participants.
Answer to the question 2
To determine the difference between pre and post body mass indexes (BMI) one way
ANOVA has been applied. The reason for selecting this test is that there are two variables,
one is categorical and the other is numerical variable. Hence the one ANOVA is the best test
to determine the difference among in pre BMI for smokers.
Null hypothesis (H0): There is no difference in BMI for the smokers and non-smokers.
Alternative hypothesis (H1): There is a difference in BMI for the smokers and non-smokers.
Table 2 One way ANOVA Output
Test statistic = 14.274
P- Value = 0.000