{"kind":"user","text":"NIST Statistical Reference Datasets, univariate summary statistics, problem Mavro: 50 transmittance measurements of a filter, taken at a sampling rate of 10 observations per second. NIST uses this data set to test the accuracy of summary statistics calculations. Dataset d holds the 50 observations in column y. Compute the sample mean of y and the sample standard deviation of y (denominator n \u2212 1)."}