A data set has values ranging from low of 10 to a high of 50. The class width is to be 10. What's wrong with using class limits 10-20, 21-31, 32-42, 43-53 for frequency table with class width of 10?
a) Each data value should fall in one class. Some data values don't have a class.
b) The classes listed have class width of 11.
c) There is nothing wrong with using such class limits for data set.
d) The classes overlap so that some data values fall in two classes.