which of the following statements must be true about the data sets a and b displayed in the histograms above? responses the standard deviation of data set a is less than the standard deviation of data set b. the standard deviation of data set a is less than the standard deviation of data set b. the range of data set a is equal to the range of data set b. the range of data set a is equal to the range of data set b. the median of data set a is equal to the median of data set b. the median of data set a is equal to the median of data set b. the standard deviation of data set a is greater than the standard deviation of data set b. the standard deviation of data set a is greater than the standard deviation of data set b. the mean of data set a is equal to the mean of data set b.
