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Chi Square, OR, RR (associations between categorical variables) Problem 3 The da

ID: 3323458 • Letter: C

Question

Chi Square, OR, RR

(associations between categorical variables)

Problem 3

The data file stenosis_smokers.sav describes a study of 215 smokers and non-smokers. The participants are evaluated for

stenosis (narrowing of coronary arteries). Use SPSS to perform the following analyses (paste in the relevant tables:

State your null and alternative hypotheses for a chi square analysis

Organize the data into a contingency table (exposure/smoking in the rows, outcome/stenosis in the columns). Calculate the expected values Calculate the percentages by rows

Paste a table with your results below

Report the chi square value

Report the p value for this chi square

Do you reject your null hypothesis?

Calculate the odds ratio and relative risk for smoking and stenosis.

Paste a table with your results below

Report the relative risk for smoking and stenosis

Report the 95% CI for relative risk

State your null hypothesis for relative risk. (hint what would the expected value for the Relative Risk or Odds Ratio equal if there is no association between

Do you reject your null hypothesis?

Report the odds ratio for smoking and stenosis

State your null hypothesis for odds ratio

Do you reject your null hypothesis?

This information was taken from SPSS File stenosis_file

smoke disease Gender
2.00    2.00 .00
2.00    2.00 .00
2.00    2.00 .00
2.00    2.00    .00
2.00    2.00    .00
2.00 2.00    .00
2.00 2.00    .00
2.00 2.00 .00
2.00 2.00    .00
2.00 2.00 .00
2.00 2.00    .00
2.00 2.00    .00
2.00 2.00 .00
2.00    2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00    2.00    .00
2.00 2.00 .00
2.00    2.00    .00
2.00    2.00 .00
2.00    2.00 .00
2.00 2.00    .00
2.00    2.00    .00
2.00    2.00    .00
2.00    2.00    .00
2.00 2.00 .00
2.00 2.00 .00
2.00    2.00    .00
2.00    2.00    .00
2.00    2.00    .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 1.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 1.00 .00
1.00 2.00 .00
1.00 1.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 1.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
1.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 1.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 2.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
2.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
1.00 1.00 .00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
2.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
1.00 2.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
2.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00
1.00 1.00 1.00

Variable view

smoke Numeric 9 2 smoking status {1.00, yes}... None 8 Right Nominal Input
disease Numeric 9 2 presence of aortic stenosis {1.00, yes}... None 8 Right Nominal Input
Gender Numeric 9 2 gender {.00, Female}... None 8 Right Nominal Input

Explanation / Answer

#include <stdio.h>

struct student

{
  
char name[50];
  
int Age;
  
char Country_Name[20];
  
char City_Name[20];
  
float Height;
  
float Weight;
  
char Education[20];

} s[8];


void getAverage(float,float);

void Increase(float,float);


int main()

{
  
int i;
  
printf("Enter information of students: ");
  
for(i=0; i<8; ++i)
  
{

  
printf("Enter name: ");
  
scanf("%s",s[i].name);

  

printf("Enter Age: ");
  
scanf("%d",&s[i].Age);
  
  

printf("Enter Country Name: ");
  
scanf("%s",s[i].Country_Name);
  
  

printf("Enter the City Name: ");
  
scanf("%s",s[i].City_Name);
  
  

printf("Enter the Height: ");
  
scanf("%f",&s[i].Height);
  
  

printf("Enter the Weight: ");
  
scanf("%f",&s[i].Weight);
  
  

printf("Enter the education : ");
  
scanf("%s",s[i].Education);

  

printf(" ");
  
}

  
printf("Displaying Information: ");
  
for(i=0; i<8; ++i)
  
{
  
printf("Name: ");
  
puts(s[i].name);
  
printf("Age: %d ",s[i].Age);
  
printf("Country Name: ");
  
puts(s[i].Country_Name);
  
printf("City Name: ");
  
puts(s[i].City_Name);
  
printf("Height: %.1f ",s[i].Height);
  
printf("Weight: %.1f ",s[i].Weight);
  
printf("Education: ");
  
puts(s[i].Education);
  
printf(" ");

  
}

getAverage(s[i].Height,s[i].Weight);

Increase(s[0].Height,s[0].Weight);
  
  
return 0;

}


void getAverage(float x,float y)

{

int i,total=0,sum=0;

for(i=0;i<8;i++)

{

total += s[i].Weight;

x = total/8;

sum += s[i].Height;

y = sum/8;

}

printf("The average Weight is %.2f ",x);

printf("The average Height is %.2f ",y);

}


void Increase(float x1,float y1)

{

x1 =(s[0].Weight/5)+(s[0].Weight);

y1 =(s[0].Height/5)+(s[0].Height);

printf("The new weight of person 1: %.2f ",x1);

printf("The new height of person 1: %.2f",y1);

}

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