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).
The person who is suffering from flu can spread the infection one day before the beginning of the symptoms and remains contagious for five to six days after the flu symptoms develop. People who have weak immune system and children are known to remain contagious for more than a week.lu is the most contagious disease. People suffering from flu can spread the infection even if the person is six feet away through droplet infection. Most experts believe the virus remains active in the droplet when the person suffering from it sneezes or coughs.