External link to Once again we continue the case study from above. In this exercise you will plot the ROC curve and..

Once again we continue the case study from above. In this exercise you will plot the ROC curve and..

Once again we continue the case study from above. In this exercise you will plot the ROC curve and produce a new function to calculate the You den index which will be used to calculate our “best” threshold. To do this, perform the following tasks: (i) Plot the values of Se and Sp that you obtained in the previous exercise as an ROC curve (see […]

External link to The enlargement of brain ventricles has been proposed as an indicator of Alzheimer’s disease…

The enlargement of brain ventricles has been proposed as an indicator of Alzheimer’s disease…

The enlargement of brain ventricles has been proposed as an indicator of Alzheimer’s disease progression. Biomedical engineers have produced software systems which allow the change in size of brain ventricles to be accurately measured from 3D magnetic resonance (MR) scans. The file “Alzheimers Data. mat” contains the result of a study in which 18 Alzheimer’ spatients had their disease progression measured using two methods, a […]

External link to A manufacturer of wooden panels prides itself on accurately producing goods to customers’…

A manufacturer of wooden panels prides itself on accurately producing goods to customers’…

A manufacturer of wooden panels prides itself on accurately producing goods to customers’ specifications. Recently it has been receiving complaints that its panels have been 1 mm too small. The manufacturer is concerned that their machine might be out of calibration. To check this, the manufacturer produces ten 1 m long panels. The manufacturers have two measuring devices: _ A wooden ruler, which is difficult […]

External link to Continuing from the previous exercise, you will now generate intensity-based segmentations over a…

Continuing from the previous exercise, you will now generate intensity-based segmentations over a…

Continuing from the previous exercise, you will now generate intensity-based segmentations over a range of different threshold values and calculate the corresponding Se and Sp values. The values of Se and Sp will be overwritten on each iteration of the loop. You will need    (i)  these later to plot the ROC curve so store them in a new array variable.

External link to The data in the file “hip Implant Numeric. mat” consist of a numerical code for the types of hip…

The data in the file “hip Implant Numeric. mat” consist of a numerical code for the types of hip…

The data in the file “hip Implant Numeric. mat” consist of a numerical code for the types of hip implant used by an orthopaedic surgeon over aone-monthperiod.Thenumericalcodeis“Metal–Metal”=1,“Ceramic–Ceramic”=2, “Metal–Plastic”=3, which denotes the composition of the components of the artificial joint. What type of data are we using?

External link to In this exercise, you will generate your own data to investigate whether the mean or the median is..

In this exercise, you will generate your own data to investigate whether the mean or the median is..

In this exercise, you will generate your own data to investigate whether the mean or the median is the most appropriate measure to use. The MATLAB function randn(m,n)produces anm-by-n matrix of pseudo-random numbers with zero mean and standard deviation The numbers are sampled from a normal, or Gaussian, distribution. We will discuss the normal distribution in detail in Section 4.4.1, but for now the important […]

External link to A study is investigating the link between alcohol use and hypertension (high blood pressure). Data..

A study is investigating the link between alcohol use and hypertension (high blood pressure). Data..

A study is investigating the link between alcohol use and hypertension (high blood pressure). Data have been gathered from 50 volunteers. The data consist of the number of units of alcohol consumed per day, and the end systolic blood pressure (in mmHg). These data are contained in the files“alcohol.mat” and “blood_pressure.mat”. (i) Compute the correlation coefficient between daily alcohol units and blood pressure. Also determine […]

External link to You have designed a new guidance system for minimally invasive endovascular surgery, which you…

You have designed a new guidance system for minimally invasive endovascular surgery, which you…

You have designed a new guidance system for minimally invasive endovascular surgery, which you believe will greatly reduce x-ray exposure. Current x-ray exposure during these operations is 1200 Gy·cm2. You estimate that your new guidance system should be able to reduce this to 1000 Gy·cm2.From a small pilot study you estimate the standard deviation of your results to be 500 Gy·cm2. Use MATLAB to determine […]

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