It is believed that 11% of all Americans are left-handed. In a random sample of 150 students from a particular college with 4293 students, 19 were left- handed. We want to find a 99% confidence interval for the percentage of all students at this particular college who are left-handed. What conditions do we need to check before proceeding with finding an interval? Check all that apply. On > 30 or normal population Oo is unknown On(1-P) > 10 On (1-P) > 10 O np > 10 OnÔ) > 10 o is known