Sammi wanted to create a dot plot based on this tally chart. in which step, if any, did sammi make a mistake creating his dot plot? steps to create a dot plot step 1 create a number line. step 2 title the dot plot step 3 plot the points sammi made a mistake in step 1 because his number line did not include all numbers in the data set. sammi made a mistake in step 2 because he chose a title without knowing if the table represents the number of hours read per week. sammi made a mistake in step 3 because he did not correctly plot each dot above the appropriate place on the number line. sammi did not make a mistake.