Answer:
a) 60 students
b) 50%
c) Yes
Explanation:
a) Looking at the graph, we can see that on the column for 20-24 words, the number of students is 30, and for 25-29 words, the number of students is also 30. When you add the total up (30+30) you get 60 students.
b) there were 120 students, and a total of 60 students between 20-29.
60/120=0.5 or 50%.
50% of students spelled between 20 and 29 words correctly.
c) Yes, there is a normal distribution that is mostly symmetric because the center is the highest point, and the two sides fall down in a bell shape. (a symmetric identifier is a bell shape)