which should be applied first which one should be applied first which is the first step to reduce data dimensionality? which one should be applied first: data sampling or dimensionality reduction? which one should be applied first: data sampling or dimensionality reduction? which one should be applied first: data sampling or dimensionality reduction? which one should be applied first: data sampling or dimensionality reduction? which is the best way to reduce dimensionality? which one should be applied first: data sampling or dimensionality reduction? which one should be applied first data sampling or dimensionality reduction? which two should be applied first: data sampling dimensionality reduction which should be applied first which is better sampling or dimensionality reduction what is data sampling which of the following is the best method used to reduce dimensionality of data? which one should be applied first: data sampling or dimensionality reduction? which one should be applied first? which data sampling should be applied first? which one should be applied first which one should be applied first