Which of the following is true of histograms? (check all that apply.) a. they are best used with large sets of data. b. they are useful when there is a wide range of data. c. they show specific values. d. they show where data is concentrated. which of the following is true of a histogram? (check all that apply.) a. the bars of a histogram should be the same width. b. using a histogram you cannot find the mode, median, and mean, but you can find the range. c. the scale of a histogram should start at the lowest frequency and go to the highest frequency, or one higher. d. intervals are shown on the horizontal axis.