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Lecture 1

# STATS 10 Lecture Notes - Lecture 1: Bar Chart, Gestation, Birth Weight

Department
Statistics
Course Code
STATS 10
Professor
Tsiang
Lecture
1

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Question 1:
The unit of observation in the data is the birth of infants.
There are 22 different variables recorded in total.
Categorical
Numerical
Bmonth
Apgar5
Bday
BirthWeight
DOW
Gestation
Gender
Fage
Premie
Mage
LowBirthWeight
Feduc
Marital
Meduc
Racemom
TotPreg
Visits
Hispmom
Gained
Smokes
Question 2:
There are totally 192 smokers. The percentage of smoking mothers among the
sample is 9.917%(=0.09917).
Question 3:
Of those categorical variables, LowBirthWeight might be associated with the
othe’s sokig haits.
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Comparing the column proportion, we see the LowBirthWeight ratio among those
ho do’t soke is .47=4.7%, heeas the LoBithWeight popotio
among those smoke is 0.078125(=7.81%). The low birth weight is higher among
those othe sokes. Theefoe, thee’s eidee poitig that LoBithWeight
is associated with smoking.
Question 4:
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