1- Suppose 5000 students' heights was surveyed and represented in the below table. a- What is the justification that this data can be used to calculate probability distribution of student heights? b- What is the probability of student height be between 65 and 68 inches?

Frequency Distribution of Students Heights Heights of Students (inches) Frequency 60 to less than 61 90 61 to less than 62 170 62 to less than 63 460 63 to less than 64 750 64 to less than 65 970 65 to less than 66 760 66 to less than 67 640 67 to less than 68 440 68 to less than 69 320 69 to less than 70 220 70 to less than 71 180