You use a t-scoreâalso known as a Student's t-distributionâwhen you want to estimate a population statistic, such as the mean, or compare two groups of data. The t-score gives good results from small samples as long as the sample data form a bell-shaped curve when graphed.
The only fortified wine that can stand open any length of time is Madeira. That'll be good for 6 months. All the rest (port or sherry or marsala), depending on what it is exactly, only maximum, 2 weeks. After that, absolutely no good. And even 2 weeks is pushing it for some fortified wines. cheers, Bonnie.
Champagne keeps for three days, reds for five and rose tastes better after a WEEK: Infographic shows how long your bottle of wine will last once opened. 1  Fortified wines which have brandy added to them can last for a month. 2  Boxed wines have longer shelf life but must be binned after expiration date.