stats question

[anonymous_j]

i usually dont ask for help here, but my assignment is due in 1.5 hrs and i dont have any of my stuff with me. this is my last question and i need some help

you are given a sample of 500 numbers {11. 81, 10. 30, 11. 21, .... , 12. 84} from a population with known mean of 10 and variance of 4. if the population were normal

i) how many numbers of the sample would you expect between 10 and 11?
ii) how many numbers of the sample would you expect to be above 13?
iii) if the pop. was not normal, how many numbers in the sample could possibly exceed 10?

thanks for any suggestions/help!