Question: Trying to name a set of data and to calculate mean

Hey, I've been trying to calculate the mean from a set of measurements I took in an experiment. The measurements are (76.0,75.9,76.1,75.9,76.0,76.1,76.1,76.0,75.9,76.0,76.0,75.9,75.9,75.9,76.0,75.8,76.0,76.0,75.9,75.9,75.9,75.9,75.9,75.9,75.9,76.0,75.9,76.0,76.0,76.0), and I always do

y1:=(all of the measurements I just listed);

then I try to do the mean of y1

Mean(y1);

but everytime I try this an error comes up. 

Error, (in Statistics:-Mean) unexpected parameters: 75.9, 76.1, 75.9, 76.0, 76.1, 76.1, 76.0, 75.9, 76.0, 76.0, 75.9, 75.9, 75.9, 76.0, 75.8, 76.0, 76.0, 75.9, 75.9, 75.9, 75.9, 75.9, 75.9, 75.9, 76.0, 75.9, 76.0, 76.0, 76.0

It always does this and always takes away the first 76.0 in the data. Can someone please help me insert this data into Maple with a different name so I can just do Mean(y1); to get the mean and Median(y1).. etc. 

Thanks

James