Use the Following Information for Questions

Short Answer

Use the following information for questions:
A psychologist has developed a new technique intended to improve rote memory. To test the method against other standard methods, 45 high school students are selected at random and each is taught the new technique. The data on the number of words memorized correctly by the students were used to create the following histogram. Note the first class represents the interval [70, 72).
-What is the overall shape of the distribution of the number of memorized words for these students?