Answer:
13.33
Step-by-step explanation:
As in the attached diagram, we can see that the points belong to interval
Data provided in the question as per the details below:
= 440
= 480
So,
= 480 - 440
= 40
Now the standard deviation of the population is
= 13.33
Hence, the standard deviation of the population for which the sample is drawn is 13.33
3003.
This is the number of combinations of 5 books from 15 = 15C5
= 15! / 10! 5!
= 15*14*13*12*11 / 5*4*3*2*1
= 3*7*13*11
= 3003.