Express the null hypothesis and the alternative hypothesis in notation form in the following scenarios: 1. the principal of the school claims that the mean age of the teachers is 45 years. the mean...

Express the null hypothesis and the alternative hypothesis  in notation form in the following scenarios:

1. the principal of the school claims that the mean age of the teachers is 45 years. the mean age of the randomly selected 35 teachers is 42 years, which is not equal to what is claimed by the principal.

2. the mean annual income of worker who are college graduates is greater than 100,000 ayear.

3. The percentage of women who watches sports on TV is not 40% as claimed by a researcher.