Answered: Q2) part 1 -Several types of…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Q2)

part 1

-Several types of correlation coefficients exist. Go to the help of the cor() function and find which correlation coefficient is calculated by default.
-Add the appropriate argument to the cor() function in the previous command so that the Spearman correlation is calculated instead.

part 2

-What is the maximum value of weight in the entire dataset?
-How many missing values are there for age?
-What is the mean value for BMIpre for the two surgical techniques (variable surgery)?
-What is the Pearson correlation between the BMI before the operation (BMIpre) and the BMI after the operation (BMIpost)?

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Repeat the previous steps but followed by the command that corrects the outlier.

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