let say i have vector X = [1,2,3,4,5,6,7,8,9,10]. How to find the average of X for each 5 elements. So the output is Y= [3,8]. 3 is the mean of [1,2,3,4,5] and so on

i want to use cudnn batch normalization. But seems like we have to estimate the mean and variance of our input before calling cudnnBatchNormalizationForwardInference https://docs.nvidia.com/deeplearning/sdk/cudnn-developer-guide/index.html#cudnnBatchNormalizationForwardInference