Answer to Question #342696 in Statistics and Probability for Jiji

Question

For each statement, state the null (Ho) and alternative (H₁) hypotheses.

1. A researcher thinks that if expectant mothers use vitamins, the birth weight of the babies will increase. The average birth weight of the population is 8.6 pounds.

2. The mean height of Grade 12 students is greater than 66 inches.

3. The average pulse rate of female joggers is less 72 beats per minute.

4. The average age of Senior High teachers at Masaya High School is greater than 27 years. 5. The average daily attendance of Grade 11 students in Statistics & Probability class is 45.

Answer 1

1.

$H_0:\mu\le8.6$

$H_a:\mu>8.6$

2.

$H_0:\mu\le66$

$H_a:\mu>66$

3.

$H_0:\mu\ge72$

$H_a:\mu<72$

4.

$H_0:\mu\le27$

$H_a:\mu>27$

5.

$H_0:\mu=45$

$H_a:\mu\not=45$