From advanced nursing classes to courses in child development, the curriculum includes an array of both classroom-based and experiential courses that will provide the necessary knowledge and skills for working in pediatrics.
The Project Management Institute, however, endorses the accepted convention that a negative variance is a bad thing, and a positive variance a good thing. A variance is the difference between the projected budget and the actual performance for a particular account. A negative variance means that the budgeted amount was greater than the actual amount spent. A positive variance means that the budgeted amount was less than the actual amount spent. Note there is some debate over whether a negative variance means an underrun or an overrun.
When the variance is greater than the mean, overdispersion is evident and thus the negative binomial distribution is likely appropriate. If the variance and mean are the same, the Poisson distribution is suggested, and when the variance is less than the mean, it's the binomial distribution that's recommended.