17. What class interval has the highest frequency?
a 11 - 15
b. 16-20
c. 26 - 30
d. 36-40
18. What class interval has the lowest frequency?
a. 11 - 15
b. 16-20
c. 26 - 30
d. 36-40
19. How many respondents were in the distribution?
a. 10
b, 20
c. 25
d.40
20. Where can you find the highest possible score?
a. first interval
b. second interval
c. middle interval
d. last interval​