BUS105 - Computing Assignment - IT Assignment Help

Assignment Task

Summary of the datasets
Dataset 1
Version 1 of a virus test is given to some people to check its accuracy
The variables
Are “Reality, virus or no virus?” and “Test result, positive or negative?”
Dataset 2
Version 2 of a virus test is given to some people to check its accuracy
The variables
Are “Reality, virus or no virus?” and “Test result, positive or negative ?”
Dataset 3
Daily flight cancelations at airline ABC
The variables are “Which Destination “
Sydney to Perth or Sydney to Brisbane
And “number of cancelations on the flight”
Assume there are no major changes to the covid pandemic during that period the dataset was taken.
Also assume the quantitative variable “number of cancelations…” is normally distributed.
Dataset 4
Daily crowd size and daily drinks sold at a sporting venue.
The variables are “Daily crowd size” and “daily drinks sold”.

Question 1
Paste dataset 1 into an appropriate dataset summarizer
Paste in the descriptive statistics into the word file. The descriptive sample statistics let you investigate the relationship between the variables “Reality, virus or no virus?” and ““Test result, positive or negative” using the sample, This lets you check the accuracy of version 1 of the virus test
negative count positive count row total  
Does not have virus 40 14 54  
Has virus 8 37 45  
         
You can divide by row totals to get proporitons   
negative % positive % total  
Does not have virus 74.07%.930.00%  
Has virus 17.78?.220.00%  
difference 56.30% -56.30%    
You should pick either the first column or the second column because
knowing one tells you the other    
Use part a Describe the relationship between the two variables using one of the following numbers, choose the correct option
The difference between sample means x1 - x2The difference between sample proportions p1 - p2
The correlation coefficient r
Your description of the relationship between the variables should also describe the relationship using plain English
Paste dataset 2 into an appropriate dataset summarizer
Paste in the descriptive statistics into the word file. The descriptive sample statistics let you investigate the relationship between the variables “Reality, virus or no virus?” and ““Test result, positive or negative” using the sample , This lets you check the accuracy of version 2 of the virus test
Use the answer in c) part to describe the relationship between the two variables using one of the following numbers, choose the correct option
The difference between sample means x1 - x2The difference between sample proportions p1 - p2
The correlation coefficient r
Your description of the relationship between the variables should also describe the relationship using plain English
Which version of the virus test is better ? , version 1 or version 2? Give a reason for you answer , you can use the answer to part b) and d) as a way of deciding which version is better, you do not have to decide which is worse false positives or false negatives

Question 2
Paste dataset 3 into the dataset summarizer
a) Paste the descriptive sample statistics below. The descriptive statistics let you investigate the relationship between the variables “Which destination?” and “Number of cancellations that day?” using the sample
Descriptive sample statistics      
xbar1 xbar2 s1 s2 n1 n2
14.5472 20 2.04343 2.9 53 47
b) Use the answer to part a) to describe the relationship by using one of the following numbers, select the correct option
The difference between sample means x1 - x2The difference between sample proportions p1 - p2
The correlation coefficient r
You should also describe the relationship in plain English
c) Paste in the graph that shows the predicted shape of the histograms if the variables are normally
distributed and compare the centres and the spreads.
you will need to paste in descriptive statitsics into assignment word document
2190752857500
d) Suppose you know the quantitative variable is normally distributed for both groups, make a comment about part c)
 

Question 3
Paste dataset 4 into an appropriate dataset summarizer
a) Paste in the descriptive statistics into the word file. The descriptive sample statistics let you investigate the relationship between the variables “Daily crowd size?” and “Daily drinks sold?” using the sample. Obviously paste in the graph as well.
descriptive sample statistics   sample size 100 sample Slope 0.100466153 sample intercept 0.59936297 sample correlation r 0.994967089 276225952500
b) Describe the relationship between the variables using one of the following numbers, select the correct option
The difference between sample means x1 - x2The difference between sample proportions p1 - p2
The correlation coefficient r

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