The first chart shows that the data is approximately normally distributed. The mean, mode and median are very close to being equal. The data show very little skewness. The mean is 166.9, standard deviation is 76.1 with 24 cases.
The boundary between contagious and non-contagious infectious diseases is not perfectly drawn, as illustrated classically by tuberculosis, which is clearly transmissible from person to person, but was not classically considered a contagious disease.he non-contagious category of infections usually require a special mode of transmission between persons or hosts. These include need for intermediate vector species (mosquitoes that cause malaria) or by non-casual transfer of bodily fluid (such as transfusions, needle sharing or sexual contact).
Two of the most commonly used words in classifying disease are contagious disease and infectious disease. Let us differentiate one word from the other. Infectious disease is said to be the mother word of the terms such as contagious disease, communicable disease, and transmissible disease. Generally, infectious diseases are defined as the ability of a disease to enter a host, transmit the disease, and infect that person. An infectious disease can be sub-classified as contagious or non-contagious.