For each of the following statements, give the null hypothesis (Ho), and the alternate hypothesis (H1).
1. The mean salary of your employees is at least $23,000
2. The mean number of children your employees have in daycare more than 3.
3. The percent of students passing the 12th grade proficiency exam is less than 40%.
4. The mean amount of money spent per student on tutoring is at most $800.