Question

Write the null hypothesis in words and in symbols.

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

Answer 1

Null hypothesis $H_0:\mu=8.6.$ The birth weight of the babies will stay the same.

Alternative hypothesis $H_a:\mu>8.6.$ The birth weight of the babies will increase.